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A1 noun #2,000 le plus courant 10 min de lecture

长度

changdu Top 2,000

Entraîne-toi Exemples Notes et astuces 长度 en 30 secondes

Explication 长度 in your Level:

At the A1 level, you only need to know that 长度 (chángdù) means 'length'. You will use it to describe simple objects like a pencil, a table, or a piece of paper. You should understand that it is a noun and is usually used with the word '是' (is) and a number with a unit like '米' (meter) or '厘米' (centimeter). For example, '桌子的长度是两米' (The length of the table is two meters). At this stage, don't worry about abstract meanings; just focus on physical things you can see and measure. You might hear it when someone is talking about buying clothes or furniture. It's a very helpful word for basic shopping and describing your surroundings. Remember: '长' is the adjective (long), and '长度' is the noun (length).

At the A2 level, you start using 长度 in more varied contexts, such as travel and hobbies. You might talk about the 长度 of a swimming pool or the 长度 of a scarf you are knitting. You should be able to ask questions using 长度, like '这条路的长度是多少？' (What is the length of this road?). You will also begin to see it in simple compound words. You should be comfortable using it alongside other measurement words like 宽度 (width) and 高度 (height). At this level, you are building the habit of using the noun form when you want to be more specific about the measurement itself rather than just saying something is 'very long'. You might also encounter it in basic science or math problems in a Chinese textbook.

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By B1, you can use 长度 in more professional or academic settings. You might use it to describe the length of a presentation, a report, or a project timeline. You understand that 长度 can refer to both physical objects and abstract concepts like the 'length of a text'. You should be able to use verbs like '测量' (measure), '增加' (increase), and '缩短' (shorten) in combination with 长度. For example, '我们需要缩短文章的长度' (We need to shorten the length of the article). You also start to recognize the difference between 长度 and 距离 (distance) and use them correctly in context. Your sentences become more complex, such as '由于长度不符合要求，我们需要重新制作' (Because the length does not meet the requirements, we need to remake it).

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At the B2 level, you use 长度 with precision in technical, scientific, or literary discussions. You might discuss the 'wavelength' (波长) in a physics context or the 'focal length' (焦距) in photography, recognizing the '长' element. You can handle abstract discussions about the 'length of life' or the 'length of history'. You are comfortable with formal structures like '长度达到...' (the length reached...) or '长度限于...' (the length is limited to...). You can also use 长度 in comparative structures that involve ratios or percentages, such as 'A的长度是B的三分之二' (The length of A is two-thirds that of B). Your understanding of the word is now nuanced enough to use it in professional reports and formal debates.

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At the C1 level, 长度 is a tool for sophisticated analysis. You might use it in literary criticism to discuss the 'length of a narrative arc' or in philosophical debates about the 'length of time' versus its 'depth'. You understand the subtle stylistic differences between using 长度 and other related terms. You can use the word in idiomatic or semi-idiomatic ways in formal speeches. You might also encounter it in legal or highly technical documents where the 'length of a contract term' or the 'length of a legal process' is discussed. Your mastery allows you to use the word effortlessly in any register, from casual conversation to high-level academic writing, always choosing the most appropriate term for the specific nuance you wish to convey.

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At the C2 level, your understanding of 长度 is native-like and encompasses all its technical, metaphorical, and historical nuances. You can discuss the evolution of measurement standards in China and how the concept of 长度 has been represented in classical literature. You might use the term in complex scientific theories, such as string theory or advanced geometry, where 'length' takes on multi-dimensional meanings. You are also aware of how 长度 interacts with other abstract concepts in fields like linguistics (e.g., vowel length) or computer science (e.g., bit length). You can play with the word in creative writing, using it to evoke specific imagery or to create complex metaphors about human experience and the passage of time. Your use of the word is flawless and perfectly adapted to any context.

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Entraîne-toi Exemples Notes et astuces

长度 en 30 secondes

长度 (chángdù) is the Chinese noun for 'length', used to quantify the physical extent of objects or the duration of events.
It is a formal term often used in measurements, mathematics, and technical descriptions, distinct from the adjective '长' (long).
Commonly paired with units like meters (米) and centimeters (厘米), it follows the pattern: [Object] + 的 + 长度.
Beyond physical objects, it can describe abstract concepts like the length of a speech, a password, or a period of time.

The term 长度 (chángdù) is a fundamental noun in the Chinese language, primarily used to denote the physical dimension of an object from end to end. In its most literal sense, it refers to the linear measurement of space. However, its utility extends far beyond simple rulers and tape measures. In a linguistic context, 长度 combines two characters: 长 (cháng), meaning long or length, and 度 (dù), meaning degree, limit, or measurement. Together, they create a formal noun that describes the concept of 'longness' as a quantifiable attribute.

Physical Dimension: The primary use of 长度 is to describe how long something is in meters, centimeters, or kilometers. It is the standard term used in mathematics, physics, and daily construction. Whether you are measuring a piece of fabric, a bridge, or a road, 长度 is the specific property you are seeking to define.

这条绳子的长度是五米。 (The length of this rope is five meters.)

Beyond the physical, 长度 can also refer to the duration of time, though this is slightly more abstract. For instance, the 'length' of a film or a speech can be described using this term, although 时长 (shícháng) is often more common for time specifically. In literature and linguistics, we discuss the 'length' of a sentence or a paragraph. This versatility makes it one of the first technical nouns a student of Chinese should master. Historically, the concept of 长度 in China has evolved from ancient units like the 尺 (chǐ) and 寸 (cùn) to the modern metric system, yet the word 长度 remains the overarching category for all these measurements.

Abstract Extension: In more advanced contexts, 长度 can describe the extent of a process or the reach of an influence. It is not just about a straight line; it is about the magnitude of a linear progression. For example, in computer science, we talk about 'string length' or 'array length' using this term.

这篇文章的长度超出了规定。 (The length of this article exceeds the regulations.)

When analyzing the word structurally, the character 度 (dù) is particularly interesting. It appears in many measurement-related words like 高度 (height), 宽度 (width), and 深度 (depth). This suffix-like behavior allows learners to build a large vocabulary quickly by recognizing the pattern of [Adjective] + 度 = [Noun of Measurement]. This systematic nature of Chinese vocabulary is perfectly exemplified by 长度.

桥梁的长度决定了施工的难度。 (The length of the bridge determines the difficulty of construction.)

Scientific Precision: In scientific papers, 长度 is used to define wavelengths (波长), focal lengths (焦距 - though different, it relates to the concept), and other precise metrics. It is a neutral, objective term devoid of emotional weight, making it ideal for technical documentation.

光波的长度可以用纳米来衡量。 (The length of light waves can be measured in nanometers.)

我们需要精确测量跑道的长度。 (We need to accurately measure the length of the runway.)

Using 长度 (chángdù) correctly requires understanding its grammatical role as a noun. Unlike the adjective 长 (cháng), which can directly describe an object (e.g., 这支笔很长 - This pen is very long), 长度 is used to discuss the *attribute* of length itself. It often appears in the structure: [Object] + 的 + 长度. This is essential for formal writing and precise descriptions.

Common Sentence Patterns: 1. [Object] 的长度是 [Measurement].
2. 测量 [Object] 的长度。
3. 增加/缩短 [Object] 的长度。

请测量一下这张桌子的长度。 (Please measure the length of this table.)

When you want to compare lengths, you might say A的长度是B的两倍 (The length of A is twice that of B). This is more formal than saying A比B长两倍. In professional settings, such as tailoring or engineering, 长度 is the standard term. For example, a tailor might ask about the 袖长 (xiùcháng - sleeve length), which is a shortened compound of 'sleeve' and 'length'. Understanding how 长度 integrates into these compounds is a key step in reaching intermediate proficiency.

Units of Measurement: When discussing 长度, you will inevitably use units like 米 (mǐ - meter), 厘米 (límǐ - centimeter), 毫米 (háomǐ - millimeter), and 公里 (gōnglǐ - kilometer). In Chinese, the unit always follows the number.

这条隧道的长度达到了十公里。 (The length of this tunnel reached ten kilometers.)

In the digital age, 长度 is also used to describe data. For instance, 密码长度 (mìmǎ chángdù) refers to password length. This is a common phrase in user interfaces and security settings. When designing a website, you might specify the 最大长度 (zuìdà chángdù - maximum length) for a text input field. This demonstrates how a basic A1 word remains relevant even in highly technical C2-level discussions about software architecture.

Verbs often used with 长度: - 测量 (cèliáng): To measure
- 估计 (gūjì): To estimate
- 限制 (xiànzhì): To limit
- 延伸 (yánshēn): To extend

我们需要限制演讲的长度。 (We need to limit the length of the speech.)

你可以根据需要调整跳绳的长度。 (You can adjust the length of the jump rope as needed.)

You will encounter 长度 (chángdù) in a variety of everyday and specialized environments. Its most common home is in the classroom, specifically during math or science lessons. Teachers will ask students to calculate the 长度 of a side of a triangle or the circumference of a circle. In this context, it is a neutral, academic term that every child learns early on.

In the Marketplace: When shopping for furniture, curtains, or clothing, 长度 is ubiquitous. A salesperson might say, '这个沙发的长度是两米' (The length of this sofa is two meters). If you are at a hardware store (五金店), you will hear people discussing the 长度 of screws, pipes, and wires.

请问这块布料的长度是多少？ (May I ask what the length of this fabric is?)

In the realm of transportation and logistics, 长度 is critical. Truck drivers must be aware of the 长度 of their vehicles to ensure they can pass through certain roads or tunnels. Shipping companies charge based on the 长度, width, and height of packages. You might hear announcements at train stations or airports regarding the 'train length' or 'runway length' in technical briefings.

In Media and Entertainment: Film critics often discuss the 长度 of a movie, especially if it is particularly long. '这部电影的长度有点让人吃不消' (The length of this movie is a bit overwhelming). Similarly, in the music industry, the 长度 of a track is a standard piece of metadata.

视频的长度最好控制在三分钟以内。 (The length of the video should ideally be kept under three minutes.)

Construction sites are perhaps the most frequent places where 长度 is shouted or written. Blueprints are covered in 长度 measurements. Architects and engineers spend their days debating the 长度 of beams and the total 长度 of utility lines. If you ever visit a construction site in China, you'll see workers with measuring tapes (卷尺) constantly verifying the 长度 of their work against the plans.

由于长度计算错误，工程被迫停工。 (Due to a calculation error in length, the project was forced to stop.)

这条围巾的长度刚好可以绕脖子两圈。 (The length of this scarf is just enough to wrap around the neck twice.)

One of the most frequent errors for beginners is confusing the noun 长度 (chángdù) with the adjective 长 (cháng). In English, we often use 'long' and 'length' interchangeably in casual speech, but in Chinese, the grammatical distinction is strict. You cannot use 长度 to describe an object directly without a verb like '是' or '达到'.

Mistake 1: Using 长度 as an Adjective: Incorrect: 这个绳子很长度 (This rope is very length).
Correct: 这个绳子很长 (This rope is very long) OR 这个绳子的长度很长 (The length of this rope is very long).

不要说“他的头发长度”，除非你在进行科学测量。 (Don't say 'his hair length' unless you are performing a scientific measurement; usually '头发很长' is enough.)

Another common pitfall is confusing 长度 with 距离 (jùlí - distance). While both involve linear measurement, 长度 usually refers to the extent of a single, tangible object, while 距离 refers to the space between two separate points. For example, you measure the 长度 of a car, but the 距离 between two cities. Using 长度 for the space between Beijing and Shanghai would sound unnatural to a native speaker.

Mistake 2: Confusing Length with Distance: Incorrect: 北京到上海的长度是多少？
Correct: 北京到上海的距离是多少？

我们讨论的是跑道的长度，而不是两座城市之间的距离。 (We are discussing the length of the runway, not the distance between two cities.)

A third mistake involves the use of measure words. Since 长度 is a noun representing an abstract concept of measurement, it doesn't usually take a measure word itself in the way 'a book' (一本书) does. You don't say '一个长度' unless you are referring to a specific, predefined length in a technical context (e.g., 'a length of pipe'). Beginners often try to force measure words where they aren't needed.

Mistake 3: Overusing Measure Words: Incorrect: 我需要一个长度的绳子。
Correct: 我需要一段特定长度的绳子 (I need a segment of rope of a specific length).

这里的长度单位是毫米。 (The unit of length here is millimeters.)

请注意，文章的长度不包括参考文献。 (Note that the length of the article does not include references.)

Understanding 长度 (chángdù) is easier when you compare it to its 'measurement siblings.' Chinese uses the suffix 度 (dù) to turn many adjectives into nouns of measurement. By learning these as a group, you can expand your vocabulary exponentially.

长度 vs. 宽度 (kuāndù): While 长度 is length, 宽度 is width. In a rectangle, the 长度 is usually the longer side, and the 宽度 is the shorter side. In 3D objects, these two along with 高度 (gāodù - height) define the object's size.
长度 vs. 距离 (jùlí): As mentioned before, 长度 is for objects, 距离 is for the gap between objects. You measure the 长度 of a bridge, but the 距离 between the bridge and your house.
长度 vs. 时长 (shícháng): 时长 specifically refers to the duration of time. While you can use 长度 for a movie's length, 时长 is more precise and common in technical or scheduling contexts.

我们需要知道箱子的长度、宽度和高度。 (We need to know the length, width, and height of the box.)

Another word often confused with 长度 is 尺度 (chǐdù). While 长度 is a literal measurement, 尺度 is often used metaphorically to mean 'scale' or 'standard.' For example, 'social standards' or 'the scale of a project' would use 尺度. If you are talking about how many centimeters something is, always stick with 长度.

Summary Table: - 长度: Length (Physical/Literal)
- 宽度: Width
- 高度: Height
- 深度: Depth
- 距离: Distance (Gap between A and B)
- 尺度: Scale/Standard (Often metaphorical)

虽然这两条线的长度相等，但视觉上看起来不同。 (Although the lengths of these two lines are equal, they look different visually.)

这条河流的长度横跨了三个省份。 (The length of this river spans across three provinces.)

请在表格中填写物品的长度。 (Please fill in the length of the item in the form.)

How Formal Is It?

Niveau de difficulté

Grammaire à connaître

Noun + 是 + Measurement

Measurement + 的 + Noun

A + 比 + B + [Adjective]

A + 的 + [Noun] + 是 + B

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Exemples par niveau

桌子的长度是一米。

The length of the table is one meter.

Subject + 的 + 长度 + 是 + Measurement.

这支笔的长度是多少？

What is the length of this pen?

Asking for measurement using '是多少'.

绳子的长度很短。

The length of the rope is very short.

Using an adjective to describe the noun '长度'.

书的长度是二十厘米。

The length of the book is twenty centimeters.

Standard measurement sentence.

这条鱼的长度是三十厘米。

The length of this fish is thirty centimeters.

Using '长度' for living things in a descriptive sense.

我需要五米长度的线。

I need five meters of thread.

Using '长度' as a qualifier.

尺子可以测量长度。

A ruler can measure length.

The verb '测量' (measure) often goes with '长度'.

这里的长度不对。

The length here is not right.

Simple subject-predicate structure.

请测量一下房间的长度。

Please measure the length of the room.

Imperative sentence with '测量'.

这条围巾的长度刚好。

The length of this scarf is just right.

Using '刚好' (just right) to describe the length.

你可以改变跳绳的长度。

You can change the length of the jump rope.

Verb '改变' (change) + object '长度'.

游泳池的长度是五十米。

The length of the swimming pool is fifty meters.

Formal measurement of a facility.

这辆车的长度是四米。

The length of this car is four meters.

Describing vehicle dimensions.

我们需要增加绳子的长度。

We need to increase the length of the rope.

Verb '增加' (increase) + object.

这个盒子的长度、宽度和高度是多少？

What are the length, width, and height of this box?

Listing multiple dimensions.

请告诉我你裤子的长度。

Please tell me the length of your pants.

Requesting specific measurement data.

这篇文章的长度超出了要求。

The length of this article exceeds the requirements.

Abstract use of '长度' for text.

演讲的长度应该控制在十分钟内。

The length of the speech should be controlled within ten minutes.

Using '长度' for time duration.

由于长度限制，我删掉了一些内容。

Due to length limits, I deleted some content.

Compound '长度限制' (length limit).

桥梁的长度决定了它的造价。

The length of the bridge determines its cost.

Using '长度' as a subject in a causal sentence.

请确认一下跑道的实际长度。

Please confirm the actual length of the runway.

Using '实际' (actual) to modify '长度'.

这个视频的长度非常适合社交媒体。

The length of this video is very suitable for social media.

Evaluating suitability based on length.

我们需要测量光缆的长度。

We need to measure the length of the fiber optic cable.

Technical context.

密码的长度必须至少是八位。

The length of the password must be at least eight characters.

Digital/IT context.

这条隧道的长度在全国排名第一。

The length of this tunnel ranks first in the country.

Formal ranking context.

我们需要精确计算波的长度。

We need to accurately calculate the wavelength.

Scientific term '波长' derived from '长度'.

生命的长度并不重要，重要的是深度。

The length of life is not important; what matters is the depth.

Philosophical/Metaphorical use.

法律程序的长度往往超乎想象。

The length of legal proceedings is often beyond imagination.

Abstract duration of a process.

你可以根据身高调整拐杖的长度。

You can adjust the length of the crutch according to your height.

Functional adjustment based on measurement.

该项目的长度预计为三年。

The length of the project is expected to be three years.

Using '长度' for project duration.

研究表明，睡眠长度影响健康。

Research shows that sleep length affects health.

Formal research context.

这种材料的长度会随温度变化。

The length of this material changes with temperature.

Scientific observation.

这部小说的长度使其难以被改编成电影。

The length of this novel makes it difficult to adapt into a movie.

Complex causal structure.

我们需要在合同中明确租赁期的长度。

We need to specify the length of the lease term in the contract.

Legal/Formal business context.

历史的长度让我们感到自身的渺小。

The length of history makes us feel our own insignificance.

Poetic/Philosophical use.

由于光年是长度单位，它衡量的是距离。

Since a light-year is a unit of length, it measures distance.

Technical definition context.

这篇文章的长度与它的深度不成正比。

The length of this article is not proportional to its depth.

Critical/Analytical use.

他试图通过增加句子的长度来增强气势。

He tried to enhance the momentum by increasing the length of the sentences.

Stylistic analysis.

该算法的运行时间取决于输入数据的长度。

The running time of the algorithm depends on the length of the input data.

Computer science context.

我们需要权衡课程的长度与内容的密度。

We need to balance the length of the course with the density of the content.

Educational planning context.

在广义相对论中，长度的测量具有相对性。

In general relativity, the measurement of length is relative.

Advanced physics context.

诗人巧妙地利用音节的长度来营造节奏感。

The poet skillfully uses the length of syllables to create a sense of rhythm.

Linguistic/Literary analysis.

这种哲思探讨了存在之长度与意义之维度的关系。

This philosophical thought explores the relationship between the length of existence and the dimension of meaning.

High-level philosophical discourse.

普朗克长度被认为是宇宙中最小的可测长度。

The Planck length is considered the smallest measurable length in the universe.

Theoretical physics context.

法律条文的长度往往反映了其规制的复杂程度。

The length of legal provisions often reflects the complexity of their regulation.

Sociological/Legal analysis.

我们需要重新审视这段历史长度所承载的文化记忆。

We need to re-examine the cultural memory carried by this span of history.

Cultural studies context.

在某些编程语言中，数组的长度是不可变的。

In some programming languages, the length of an array is immutable.

Technical programming context.

他用一生的长度去丈量那片荒原的广度。

He used the length of his entire life to measure the breadth of that wilderness.

Literary metaphor.

Collocations courantes

测量长度

增加长度

缩短长度

实际长度

最大长度

平均长度

标准长度

特定长度

计算长度

限制长度

Phrases Courantes

长度单位

波长

身长

袖长

全长

步长

焦距

密码长度

文章长度

视频长度

Souvent confondu avec

长度 vs 距离

Distance between two points vs length of one object.

长度 vs 时长

Duration of time vs physical length.

长度 vs 尺度

Metaphorical scale vs literal measurement.

Expressions idiomatiques

"取长补短 (Learn from others' strengths to offset one's own weaknesses)"

"扬长避短 (Make use of one's strengths and avoid weaknesses)"

"一技之长 (A professional skill)"

"长话短说 (To make a long story short)"

"拔苗助长 (To spoil things by excessive enthusiasm)"

"日久天长 (Over a long period of time)"

"三长两短 (Unexpected misfortune/death)"

"语重心长 (To speak with sincere words and earnest wishes)"

"截长补短 (Cut from the long to supplement the short)"

"尺有所短，寸有所长 (Every person has their strengths and weaknesses)"

Facile à confondre

长度 vs

Structures de phrases

Famille de mots

Apparenté

长大

长处

长寿

长期

高度

宽度

深度

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Comment l'utiliser

noun vs adj

长度 is the noun; 长 is the adjective.

abstract use

Can be used for time or text length.

Erreurs courantes

Using 长度 as an adjective (e.g., 这个很长度).
Confusing 长度 with 距离 (distance).
Forgetting to use '是' when stating a measurement.
Confusing the pronunciation of 'cháng' with 'zhǎng'.
Using 长度 for person's height (use 身高 instead).

Astuces

Noun Usage

Always use 长度 as a noun. Pair it with '是' to state a value.

The 'Du' Suffix

Learn 长度, 宽度, and 高度 together to master physical descriptions.

Professionalism

Use 长度 in business or technical writing to sound more objective.

Asking Questions

Practice saying '长度是多少' until it feels natural.

Unit Recognition

Listen for the unit following the number to confirm a 长度 measurement.

Precision

When describing dimensions, always list 长度 first, then width and height.

Metric System

Modern China uses the metric system; avoid old units like 'Chi' in formal work.

Length vs Distance

Remember: 长度 is for the object itself; 距离 is for the gap between objects.

No 'Very Length'

Never say '很长度'. This is a common mistake for English speakers.

Tech Use

In apps, '长度' often refers to character counts in text fields.

Mémorise-le

Origine du mot

长 (cháng) depicts long hair, symbolizing length. 度 (dù) depicts a hand measuring, symbolizing measurement.

Contexte culturel

Strict adherence to the metric system in official contexts.

Chi (尺), Cun (寸), Li (里).

Pratique dans la vie réelle

Contextes réels

Amorces de conversation

"这张桌子的长度合适吗？"

"你觉得这篇文章的长度怎么样？"

"我们需要多长的绳子？"

"你家到这里的距离（长度）远吗？"

"这个视频的长度太长了。"

Sujets d'écriture

描述你房间里三件物品的长度。

写一段关于你理想中演讲长度的文字。

讨论一下为什么时间的长度感觉会变化。

Questions fréquentes

10 questions

No, 长度 is a noun. You should say '长度很长' or just '很长'.

长度 is more formal and technical; 长短 is more casual and can also mean 'strengths and weaknesses'.

Yes, but '时长' is more common for duration.

You can say '长度是多少？' or '多长？'.

米 (m), 厘米 (cm), 毫米 (mm), 公里 (km).

Usually '身高' (height) is used for people's vertical length.

No, it is a regular noun.

There isn't a direct opposite noun, but '宽度' (width) is its common counterpart.

Yes, '这条路的长度是十公里' is correct.

Yes, for array or string length.

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