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A1 noun #2,569 最常用 12分钟阅读

spiral

At the A1 level, the word 'spiral' is introduced as a basic shape. You can think of it as a line that goes around and around, getting bigger or smaller. Imagine the shell of a snail; that is a perfect spiral. It is not a circle, because a circle is closed. A spiral is open and keeps going. You might see this shape in drawings or in nature. When you draw a spiral, you start at a dot in the middle and draw a line that circles around the dot, moving further away each time. It is a fun shape to draw. You might also see a spiral in toys, like a spinning top. Learning this word helps you describe simple things you see every day. For example, if you look at a sunflower, the seeds in the middle make a spiral pattern. If you watch water go down the drain in a sink, it sometimes makes a spiral shape. It is a very common and beautiful shape. Teachers might ask you to draw a spiral in an art class. You can use a pencil to make a spiral on paper. It is easy to understand because you can see it with your eyes. Just remember: around and around, getting bigger and bigger. That is a spiral.
At the A2 level, you learn more ways to use the word 'spiral'. You start to see it used as an adjective to describe everyday objects. The most common example is a 'spiral notebook'. This is a book with paper that is held together by a wire that goes around and around in a spiral shape. Many students use spiral notebooks for school. Another common example is a 'spiral staircase'. This is a set of stairs that goes up in a circle, like a spiral. It is often used in small spaces because it does not take up much room. You might also hear about a 'spiral shape' in food, like pasta or cut vegetables. At this level, you can use 'spiral' to describe things you buy or see in a house. You understand that it is not just a drawing, but a shape that real objects have. For example, you can say, 'I bought a red spiral notebook for my English class.' Or, 'We walked up the spiral staircase to the top of the tower.' It helps you give better descriptions of the world around you. You also learn that things can move in a spiral. For example, a bird flying high in the sky might fly in a spiral. Or a leaf falling from a tree might spin in a spiral as it comes down. It is a very useful word for describing shapes and movement.
At the B1 level, your understanding of 'spiral' expands to include its use as a verb and its basic figurative meanings. As a verb, 'to spiral' means to move in a spiral shape, either upwards or downwards. For example, 'The smoke spiraled up from the fire.' You also start to learn the figurative phrase 'downward spiral'. This is a very important concept. It means a situation is getting worse and worse, and it is hard to stop. For example, if someone loses their job, they might lose their house, and then get sick. This is a downward spiral. It is a chain reaction of bad events. You might read in the news that 'the economy is in a downward spiral.' This means prices are going up, people are losing jobs, and things are generally getting worse. Understanding this figurative use is crucial for reading news and having deeper conversations. You can also use it to describe feelings. If you are very stressed, your thoughts might 'spiral out of control'. This means you are thinking of one bad thing after another, and you cannot stop. At B1, you move from just describing physical shapes to describing complex situations and emotions using the word 'spiral'. It makes your English sound much more natural and expressive.
At the B2 level, you master the idiomatic and abstract uses of 'spiral'. You are comfortable using phrases like 'spiraling out of control' to describe situations that are escalating rapidly. For example, 'The argument between the two neighbors spiraled out of control and the police were called.' You understand that a spiral implies a self-reinforcing cycle. In economics, you might discuss a 'wage-price spiral', where higher wages lead to higher prices, which in turn lead to demands for even higher wages. You can also use 'spiral' as a noun to describe this cycle itself: 'The country is caught in a spiral of debt.' You understand the difference between a literal spiral (like a galaxy or a staircase) and a figurative spiral (like a psychological breakdown or an economic crisis). You can use it to add dramatic effect to your storytelling or arguments. For instance, 'Her lies created a spiral of deceit that eventually ruined her career.' At this level, you also recognize the word in various scientific and technical contexts, even if you don't know the deep science behind it. You know that DNA is a double spiral (helix), and that hurricanes have spiral rain bands. Your use of the word is versatile, accurate, and nuanced, allowing you to communicate complex ideas effectively.
At the C1 level, 'spiral' is a tool for sophisticated analysis and expression. You use it effortlessly in academic, professional, and literary contexts. You can discuss complex sociological phenomena, such as the 'spiral of silence', a theory explaining how minority opinions are suppressed. In psychological discourse, you can articulate the nuances of a 'shame spiral' or a 'negative thought spiral', understanding the cognitive feedback loops involved. You are adept at using the verb form dynamically: 'The cost of the project spiraled, threatening the company's viability.' You appreciate the metaphorical weight of the word, using it to describe historical cycles or political escalation. For example, 'The two nations are locked in an arms race, a dangerous spiral that threatens global security.' You can also differentiate 'spiral' from related terms like 'vortex', 'helix', or 'gyre' with precision, choosing the exact word needed for the context. In literary analysis, you might discuss how an author uses a spiral motif to represent descent into madness or the cyclical nature of time. Your vocabulary is rich enough that 'spiral' is just one of many options you have to describe compounding, cyclical, or escalating phenomena, but you know exactly when it is the most impactful choice.
At the C2 level, your grasp of 'spiral' encompasses its deepest mathematical, scientific, and philosophical implications. You can engage in discussions about the Archimedean spiral versus the logarithmic spiral, understanding how the latter manifests in the golden ratio and the Fibonacci sequence found in nature. You can read and comprehend advanced scientific literature discussing spiral galaxies, spiral cleavage in embryology, or the helical structure of complex proteins. Beyond the technical, you use the word with complete mastery in rhetoric and debate. You can deconstruct an opponent's argument by pointing out that it relies on a 'spiraling logic' or a circular, self-fulfilling prophecy. You understand the subtle register differences; for instance, knowing when 'downward spiral' sounds too colloquial for a formal academic paper and opting for 'compounding deterioration' or 'negative feedback loop' instead, while still recognizing 'spiral' as the root concept. You can play with the word poetically, using it to evoke a sense of vertigo, inevitability, or infinite progression. At this level of proficiency, 'spiral' is fully integrated into your cognitive framework, allowing you to conceptualize and articulate the most intricate patterns of growth, decay, and dynamic movement in the universe.
开始练习 例句 笔记与提示

spiral 30秒了解

  • A shape that winds around a center.
  • Like a snail shell or a galaxy.
  • Can mean a situation getting worse.
  • Used as a noun, verb, or adjective.
The word spiral refers to a fascinating geometric shape that is found everywhere in the natural world and human-made objects. At its most basic level, a spiral is a curve which emanates from a point, moving farther away as it revolves around the point. You can think of it as a circle that never quite closes, but instead continues to grow or shrink in a continuous, flowing curve. This shape is incredibly common in nature. For example, if you look at a snail shell, you will see a perfect spiral. The shell starts at a tiny central point and wraps around itself, getting wider and wider to make room for the growing animal inside.
Natural Spirals
Found in shells, galaxies, and weather patterns like hurricanes.
Beyond snails, we see spirals in the vastness of space. Many galaxies, including our own Milky Way, are spiral galaxies. They have a dense center with long arms of stars and gas spiraling outward.

The Milky Way is a massive spiral galaxy containing billions of stars.

In weather, hurricanes and typhoons form massive spiral patterns of clouds rotating around a calm center known as the eye. Even on a smaller scale, water draining from a bathtub often forms a spiraling vortex. In mathematics, spirals are studied extensively. The Archimedean spiral, for instance, has a constant distance between its turns, much like a coiled rope. The logarithmic spiral, often associated with the golden ratio, grows wider at a constant angle, which is the type seen in nautilus shells and sunflowers.
Mathematical Spirals
Include Archimedean, logarithmic, and Fibonacci spirals.
The arrangement of seeds in a sunflower follows a complex spiral pattern that maximizes the number of seeds that can fit in the flower head.

The seeds of the sunflower form a beautiful spiral pattern.

This is deeply connected to the Fibonacci sequence, a series of numbers where each number is the sum of the two preceding ones. When you draw arcs based on these numbers, you get a perfect spiral.

The architect designed a spiral staircase to save space.

In everyday life, we use the word to describe many objects. A spiral notebook has a continuous wire coiled through holes in the paper to hold the pages together. A spiral staircase winds upward around a central pole, saving floor space while providing access to higher levels.
Everyday Spirals
Notebooks, staircases, and springs are common examples.

She wrote her notes in a blue spiral notebook.

The concept of a spiral is not just physical; it is a fundamental pattern of growth and energy. It represents expansion, evolution, and the cyclical nature of life. Whether you are looking at the microscopic structure of DNA, which forms a double helix (a type of 3D spiral), or the macroscopic structure of a galaxy, the spiral is a universal symbol of dynamic movement.

The smoke rose in a lazy spiral from the campfire.

Understanding the word spiral helps you describe a vast array of phenomena, from the simple toys children play with, like a Slinky, to the most complex structures in the universe. It is a word that bridges the gap between basic geometry and profound natural laws, making it an essential part of your vocabulary.
Using the word spiral correctly involves understanding both its literal and figurative meanings. In a literal sense, spiral is used as a noun to describe the physical shape itself. For example, you might say, 'The child drew a spiral on the paper.' Here, it simply refers to the curving line. It can also be used as an adjective to describe objects that have this shape. Common examples include 'spiral staircase,' 'spiral notebook,' or 'spiral galaxy.'
Adjective Usage
Describes nouns that possess a spiraling shape, like a staircase.

We walked up the spiral staircase to the roof.

When used as a verb, spiral describes the action of moving in a spiral shape. For instance, 'The bird spiraled down from the sky' or 'The smoke spiraled up from the chimney.' However, the figurative use of spiral is perhaps even more common in everyday conversation and news media. Figuratively, a spiral refers to a situation that is continuously getting worse or, less commonly, better, in a way that is difficult to control. The most frequent phrase is 'downward spiral.' This describes a situation where one bad event causes another, which causes another, leading to a rapid decline.
Figurative Noun
A process of continuous decline or increase, often uncontrollable.

The economy fell into a downward spiral after the crash.

For example, someone might fall into a downward spiral of debt, where they borrow money to pay off previous loans, accumulating more interest and making the situation progressively worse. Conversely, an 'upward spiral' describes a positive feedback loop, where good events build on each other, though this is used less frequently.

Positive thinking can create an upward spiral of success.

As a verb in a figurative sense, you might say, 'The argument spiraled out of control.' This means the disagreement started small but quickly grew larger and more intense, much like a spiral growing wider as it moves outward.
Figurative Verb
To continuously increase or decrease rapidly, often out of control.

Housing prices have spiraled in the last few years.

You will also hear about a 'wage-price spiral' in economics, which is a situation where rising wages cause prices to rise, which in turn causes workers to demand even higher wages.

The central bank wants to avoid an inflationary spiral.

When using spiral, pay attention to the context. If you are talking about physical objects, ensure the object actually has a curving, winding shape. If you are using it figuratively, make sure the situation involves a continuous, compounding change, usually in a negative direction. Mastering both the literal and figurative uses of spiral will greatly enhance your ability to describe complex physical shapes and dynamic, evolving situations in English.
The word spiral appears in a wide variety of contexts, from casual daily conversation to highly specialized academic fields. In everyday life, you will most frequently hear it when people describe common objects. Students and office workers constantly refer to 'spiral notebooks.' Homeowners and architects discuss 'spiral staircases' when designing homes.
Everyday Contexts
School supplies, home architecture, and cooking (spiralized vegetables).

I need to buy a new spiral notebook for math class.

In the kitchen, a recent culinary trend has popularized the 'spiralizer,' a tool used to cut vegetables like zucchini into long, spiral ribbons. You might hear someone say they are making 'spiralized zucchini.' In news and journalism, the figurative use of spiral is ubiquitous. Economic reports frequently warn of an 'inflationary spiral' or a 'downward spiral' in the stock market.
News and Media
Used to describe economic downturns or escalating conflicts.

The country is caught in a spiral of violence.

Political commentators might describe a 'spiral of silence,' a sociological theory where people are afraid to express their opinions if they feel they are in the minority. In psychology and mental health discussions, a 'shame spiral' or a 'depressive spiral' describes a mental state where negative thoughts feed into each other, making the person feel progressively worse.

He fell into a dark spiral after losing his job.

In the realm of science, spiral is a fundamental term. Astronomers study 'spiral galaxies' and classify them based on the tightness of their spiral arms.
Scientific Contexts
Astronomy, biology, and meteorology frequently use the term.

The Andromeda galaxy is a massive spiral near our own.

Biologists discuss the 'spiral cleavage' of embryos in certain animals, or the spiral arrangement of leaves on a plant stem, known as phyllotaxis. Meteorologists use the term to describe the 'spiral bands' of rain that radiate outward from the center of a hurricane.

The radar showed heavy rain in the outer spiral bands of the storm.

In sports, particularly American football, a 'perfect spiral' refers to a forward pass where the ball spins smoothly on its longitudinal axis, making it aerodynamic and accurate. You will hear sports commentators praise a quarterback for throwing a 'tight spiral.' As you can see, whether you are watching a cooking show, reading the financial news, studying astronomy, or watching a football game, the word spiral is a versatile and essential part of the English vocabulary.
When learning the word spiral, there are several common mistakes that learners make, primarily involving confusing it with similar shapes or misusing its figurative forms. The most frequent mistake is confusing a spiral with a circle. A circle is a closed loop where every point is the same distance from the center. A spiral, however, never closes; its distance from the center continuously increases or decreases.
Spiral vs. Circle
A circle is closed; a spiral is open and expanding.

Incorrect: He drew a closed spiral. (It should be a circle).

Another common confusion is between a spiral and a helix. While often used interchangeably in everyday language, strictly speaking, a spiral is a two-dimensional curve on a flat plane (like a drawing on paper), whereas a helix is a three-dimensional shape, like a coil spring or a spiral staircase. However, in common English, people frequently use spiral to describe 3D objects, hence 'spiral staircase.'

DNA is technically a double helix, but often called a spiral.

Learners also sometimes struggle with the verb form. When using spiral as a verb to describe a worsening situation, it is almost always followed by 'out of control' or 'downward.' Saying 'The situation spiraled' is acceptable, but 'The situation spiraled out of control' is much more natural and idiomatic.
Verb Collocations
Always pair the verb with direction words like 'downward' or 'out of control'.

The costs began to spiral out of control.

Another mistake is using spiral to describe something that is simply messy or chaotic, without the element of continuous compounding change. A messy room is not a spiral. A situation where one mistake leads to another, bigger mistake, is a spiral.

His lies created a spiral of deception.

Finally, pay attention to spelling. It is s-p-i-r-a-l. Sometimes learners spell it 'spirel' or 'spirle.' Remembering the 'a' at the end is crucial.
Spelling
Remember it ends in '-al', not '-el' or '-le'.

Make sure to spell spiral correctly on your geometry test.

By understanding the specific geometric properties of a spiral and mastering its common idiomatic pairings, you can avoid these frequent pitfalls and use the word with confidence and precision.
There are several words related to spiral that are useful to know, as they describe similar shapes or concepts but have subtle differences in meaning. The word 'coil' is very similar. A coil is a series of loops, typically made of wire or rope. While a spiral can be flat (2D), a coil is almost always three-dimensional and often cylindrical, like a spring.
Coil
A 3D series of loops, like a spring or a coiled snake.

The snake lay in a tight coil, resembling a spiral.

Another related word is 'helix.' As mentioned earlier, a helix is the precise mathematical term for a 3D spiral, like the shape of DNA or a corkscrew. It has a constant radius, whereas a 2D spiral's radius changes.

The corkscrew has a helical shape, similar to a spiral.

The word 'vortex' is also related, but it specifically refers to a mass of fluid (like water or air) that is spinning rapidly and pulling things toward its center. A whirlpool or a tornado is a vortex. While a vortex has a spiral shape, the word emphasizes the powerful, pulling motion of the fluid.
Vortex
A spinning fluid mass, like a whirlpool, that forms a spiral shape.

The water drained, forming a small spiral vortex.

'Curl' and 'twirl' are softer, less formal words. A curl is a curved or spiral shape, often used to describe hair or a piece of ribbon. A twirl is the act of spinning around, which might create a spiral shape in the air, like a dancer twirling a ribbon.

Her hair fell in beautiful, natural spiral curls.

Finally, 'whorl' is a specific term often used in biology or forensics. It describes a pattern of spirals or concentric circles, such as the pattern found on a fingerprint or the arrangement of leaves on a plant stem.
Whorl
A circular or spiral pattern, commonly used for fingerprints.

The detective examined the spiral whorl of the fingerprint.

By learning these related words, you can be much more precise in your descriptions. You can choose 'coil' for a spring, 'vortex' for a whirlpool, 'curl' for hair, and 'spiral' for the general, expanding geometric shape or a worsening situation.

How Formal Is It?

正式

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非正式

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难度评级

需要掌握的语法

按水平分级的例句

1

Look at the snail's shell; it is a spiral.

shape like a circle that gets bigger

Used as a noun to describe a shape.

2

Draw a spiral on the paper.

curved line

Noun as the object of the verb 'draw'.

3

The toy is a colorful spiral.

shape of the toy

Noun describing the toy.

4

A spiral goes round and round.

moves in circles

Noun as the subject of the sentence.

5

I see a spiral in the water.

shape in the water

Noun indicating a shape.

6

The flower has a spiral in the middle.

pattern in the flower

Noun indicating a pattern.

7

This is a spiral shape.

type of shape

Used as an adjective modifying 'shape'.

8

Can you make a spiral?

create the shape

Noun as the object.

1

I write my notes in a spiral notebook.

book with a wire binding

Used as an adjective modifying 'notebook'.

2

We walked up the spiral staircase.

stairs that go in a circle

Used as an adjective modifying 'staircase'.

3

The bird flew in a spiral.

flew in a circular path

Noun describing the path of flight.

4

She has a spiral ring on her finger.

ring shaped like a coil

Adjective modifying 'ring'.

5

The smoke made a spiral in the air.

curved shape of smoke

Noun describing the shape of the smoke.

6

He bought a spiral lamp for his room.

lamp with a twisted shape

Adjective modifying 'lamp'.

7

The snake lay in a spiral.

coiled shape

Noun describing the snake's position.

8

A tornado is a big spiral of wind.

spinning wind

Noun describing the storm.

1

The economy is in a downward spiral.

getting worse and worse

Noun in a figurative phrase indicating decline.

2

Prices began to spiral out of control.

increase rapidly

Verb meaning to increase rapidly and uncontrollably.

3

He fell into a spiral of bad decisions.

chain of bad choices

Noun indicating a continuous sequence.

4

The airplane spiraled down to the ground.

flew down in circles

Verb indicating downward circular movement.

5

Our galaxy is a giant spiral.

shape of the galaxy

Noun describing a massive structure.

6

She used a tool to spiral the vegetables.

cut into curly strips

Verb meaning to cut into a spiral shape.

7

The argument spiraled into a big fight.

got worse quickly

Verb indicating escalation.

8

I need a spiral binding for my report.

wire holding pages together

Adjective modifying 'binding'.

1

The company is trying to avoid an inflationary spiral.

cycle of rising prices and wages

Noun in an economic context.

2

Her anxiety caused her thoughts to spiral.

worsen rapidly in a loop

Verb used figuratively for mental state.

3

The DNA molecule forms a double spiral, known as a helix.

two twisted lines

Noun used in a scientific context.

4

The quarterback threw a perfect spiral.

football spinning smoothly

Noun in a sports context.

5

The situation is spiraling rapidly, requiring immediate action.

escalating out of control

Verb in present continuous, indicating urgency.

6

They were caught in a spiral of violence and revenge.

endless cycle of harm

Noun indicating a destructive cycle.

7

The architect incorporated a logarithmic spiral into the design.

specific mathematical curve

Noun with a specific mathematical adjective.

8

Costs have spiraled upwards since the project began.

increased continuously

Verb indicating continuous increase.

1

The theory of the spiral of silence explains why minority views are often suppressed.

sociological concept of self-censorship

Noun as part of a specific sociological term.

2

The nation's debt has spiraled to unprecedented levels.

grown uncontrollably

Verb in present perfect, showing extreme escalation.

3

He analyzed the spiral motifs prevalent in ancient Celtic art.

recurring curved patterns

Adjective modifying 'motifs' in an art history context.

4

The patient was experiencing a severe depressive spiral.

worsening cycle of depression

Noun in a clinical psychological context.

5

The negotiations spiraled into a complex web of demands and counter-demands.

devolved into chaos

Verb showing complex devolution.

6

The hurricane's outer spiral bands brought torrential rain to the coast.

curved lines of storms

Adjective modifying 'bands' in meteorology.

7

To break the downward spiral, radical intervention is necessary.

stop the continuous decline

Noun phrase 'downward spiral' as the object.

8

The novel's plot follows a spiraling trajectory toward an inevitable tragedy.

winding path leading to a bad end

Adjective (participle) modifying 'trajectory'.

1

The Fibonacci sequence manifests physically as a golden spiral in many biological structures.

mathematical curve found in nature

Noun in an advanced mathematical/biological context.

2

The geopolitical landscape is currently characterized by an escalatory spiral of sanctions.

continuous cycle of retaliation

Noun in a complex geopolitical analysis.

3

The author employs a spiraling narrative structure, constantly circling back to the central trauma.

storytelling method that loops back

Adjective (participle) describing literary technique.

4

The central bank's policy failed to arrest the deflationary spiral.

stop the cycle of falling prices

Noun in advanced macroeconomic discourse.

5

The embryologist observed the spiral cleavage characteristic of protostome development.

specific type of cell division

Adjective in a highly specialized biological context.

6

His argument was fundamentally flawed, relying on a spiraling logic that assumed its own conclusion.

circular, self-referential reasoning

Adjective describing a logical fallacy.

7

The universe is replete with spiraling phenomena, from the microscopic to the galactic scale.

things that move or form in curves

Adjective (participle) modifying 'phenomena'.

8

The sheer complexity of the interdependent systems caused the failure cascade to spiral exponentially.

worsen at an accelerating rate

Verb used with an adverb of degree in systems theory.

近义词

coil helix curl whorl twist corkscrew

反义词

straight line square

常见搭配

downward spiral
spiral staircase
spiral notebook
spiral galaxy
inflationary spiral
spiral out of control
death spiral
tight spiral
spiral binding
upward spiral

常用短语

spiral out of control

caught in a spiral

downward spiral

wage-price spiral

spiral of silence

death spiral

perfect spiral

spiral staircase

spiral notebook

spiral fracture

容易混淆的词

spiral vs circle

spiral vs helix

spiral vs coil

习语与表达

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容易混淆

spiral vs

spiral vs

spiral vs

spiral vs

spiral vs

句型

如何使用

verb spelling

In US English, the continuous form is usually 'spiraling' (one L). In UK English, it is 'spiralling' (two Ls).

literal vs figurative

Literal use is common for objects; figurative use is common for situations.

常见错误
  • Using 'spiral' to describe a simple closed circle.
  • Forgetting the 'out of control' part when using it as a verb for bad situations.
  • Spelling it 'spirel' or 'spirle'.
  • Using it to describe a messy room (a spiral needs a pattern or chain reaction).
  • Confusing it with a straight line.

小贴士

Verb Collocations

Always use 'spiral' with directional words when it's a verb. Say 'spiral down' or 'spiral out of control'.

American vs British

Remember: US = spiraling (1 L), UK = spiralling (2 Ls). Choose one and be consistent.

Synonym Check

If you mean a 3D spring shape, 'coil' or 'helix' might be more accurate than 'spiral' in formal writing.

Dramatic Effect

Use 'downward spiral' in conversation to emphasize how bad a situation has become.

News Context

When you hear 'spiral' on the news, expect bad news about the economy or a conflict.

Avoid Redundancy

Don't say 'circular spiral'. A spiral is already curved. Just say 'spiral'.

Biology Terms

In biology, look out for 'spiral cleavage' or 'spiral DNA'. It implies a twisting structure.

Fibonacci

Connect 'spiral' to the Fibonacci sequence to impress your math teachers.

Household Items

Look around your house. You likely have spiral notebooks, spiral pasta, or spiral lightbulbs.

Shame Spiral

In psychology, a 'shame spiral' is a great phrase to describe feeling worse and worse about a mistake.

记住它

记忆技巧

Think of a SPider spinning a web round and round; it makes a SPIral.

词源

Mid 16th century

文化背景

In American football, a 'perfect spiral' is the ideal way to throw the ball for maximum distance and accuracy.

The term 'inflationary spiral' is a critical concept in modern economics, describing a dangerous cycle of rising prices.

Spirals are a dominant motif in ancient Celtic art, symbolizing eternity and continuous growth.

在生活中练习

真实语境

对话开场白

"Have you ever walked up a really tall spiral staircase?"

"What do you do when you feel your stress spiraling out of control?"

"Why do you think the spiral shape is so common in nature?"

"Do you prefer spiral notebooks or bound journals?"

"Can you explain what an inflationary spiral is?"

日记主题

Describe a time when a small problem spiraled into a big one.

Look around your room or house. How many spiral shapes can you find?

Write a short story about a journey down a mysterious spiral staircase.

How do you stop a 'downward spiral' of negative thoughts?

Research and write about the golden spiral in nature.

常见问题

10 个问题

No. A circle is a closed loop. A spiral is an open curve that keeps getting wider or narrower.

Technically, a 3D spiral is called a helix. However, in everyday English, people often call 3D objects 'spirals', like a 'spiral staircase'.

It means a situation is getting worse very quickly and cannot be stopped. It is often used for arguments, debt, or emotions.

In American English, it is usually spelled 'spiraling' (one L). In British English, it is 'spiralling' (two Ls). Both are correct.

A downward spiral is a situation where one bad event causes another, making things continuously worse. For example, losing a job leading to debt, leading to depression.

Yes, though it is less common. An upward spiral is a positive cycle where good things lead to more good things.

In science, 'helix' is the precise term for a 3D coiled shape with a constant radius. 'Spiral' is usually 2D or has a changing radius.

It is a notebook where the pages are held together by a wire coiled through holes in the paper.

It means throwing the football so that it spins smoothly on its long axis, making it fly straight and far.

Yes. It is often used as an adjective to describe nouns, such as a 'spiral staircase' or a 'spiral galaxy'.

自我测试 180 个问题

/ 180 correct

Perfect score!

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abfacible

C1

To systematically strip or remove the external surface or facade of a structure or material for analysis, restoration, or cleaning. It specifically refers to the technical act of uncovering underlying layers while preserving the integrity of the core material.

abfactency

C1

指与事实或客观现实完全脱节的状态。通常用于描述那些逻辑自洽但与现实毫无关联的理论或论点。

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