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B2 verb 6 Min. Lesezeit

映射

yingshe

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At the A1 level, you don't really need to use '映射' (yìngshè) yet. It is a very formal and technical word. Beginners usually learn '看' (kàn - look) or '亮' (liàng - bright). If you were to encounter it, just think of it as a fancy way to say light is hitting something. Imagine the sun shining on a table; that is a simple kind of 'mapping' of light. However, for your daily needs, stick to words like '照' (zhào) which means to shine. You might see the character '映' in simple words like '电影' (diànyǐng - movie), which literally means 'electric shadow'—a type of projection. This 'projection' idea is the core of '映射'.

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For A2 learners, '映射' might appear in descriptive stories about nature. When you describe a beautiful scene, like the sun shining on a lake, '映射' adds a more poetic touch than just saying 'shining'. Think of it as 'casting a reflection'. You might also start seeing it in very basic computer instructions if you are learning coding in Chinese. The main thing to remember at this level is that '映射' involves two things: the light (or image) and the place where it lands. It is not used for 'thinking' or 'reflecting' on your day; it is strictly about light or simple connections between two points.

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At the B1 level, you should begin to distinguish '映射' from '反映' (fǎnyìng). While '反映' is used for general feedback or showing a situation, '映射' starts to take on its 'mapping' meaning. You might hear it in a math class when talking about functions, or in a more advanced discussion about how a story 'reflects' a certain theme. You should be able to recognize it in reading passages about technology or art. It is a word that makes your Chinese sound more educated. Instead of just saying 'this shows that,' you could say 'this maps to that' or 'this reflects that' using 映射 to show a deeper structural connection.

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At the B2 level, '映射' is an essential vocabulary item, especially for academic and professional contexts. You are expected to use it in three ways: 1. Physical projection of light (optics). 2. Mathematical mapping (functions and sets). 3. Abstract mirroring (how society or psychology is reflected in something). You should understand that 映射 implies a systematic relationship. In a B2 essay about social issues, you might write about how the housing market '映射' the economic gap between rich and poor. In a professional setting, you might use it to discuss how user behavior '映射' onto your product's data model. It is a precise word for a precise correspondence.

For C1 learners, '映射' becomes a tool for nuanced analysis. You will use it to describe complex systems where one set of data or behaviors is mapped onto another. You should be comfortable using it in technical jargon, such as '端口映射' (port mapping) or '内存映射' (memory mapping). Furthermore, in literary analysis, you would use '映射' to discuss how a character's internal world is projected onto the landscape or how a historical event is mapped onto a fictional narrative. At this level, you should also be aware of its synonyms like '对映' (symmetry/correspondence) and '折射' (refraction) and choose the most accurate one based on the context of the relationship.

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At the C2 level, you have a masterly command of '映射'. You can use it in philosophical discourse to discuss the 'mapping' of human consciousness onto language or the 'mapping' of metaphysical concepts into physical forms. You understand the subtle difference between 映射 and its peers in formal logic and high-level science. You might use it in a doctoral thesis or a high-level policy document to describe the structural isomorphism between two disparate systems. For a C2 speaker, '映射' is not just a word; it is a conceptual framework for describing the interconnectedness and representational nature of reality.

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映射 in 30 Sekunden

映射 means to reflect light physically or to map data/concepts logically between two sets.
It is a formal word used in optics, mathematics, computer science, and literary analysis.
Commonly paired with '在...上' for light or '到' for data mapping.
Essential for B2+ learners to describe systematic relationships and structural mirroring.

The Chinese word 映射 (yìngshè) is a sophisticated verb that bridges the gap between physical phenomena, mathematical precision, and socio-cultural analysis. At its most basic level, it describes the physical act of light or an image being reflected or cast onto a surface. However, as learners progress to the B2 level and beyond, the word takes on much more abstract and technical layers. In modern Mandarin, you will encounter 映射 in three primary domains: the physical world (optics), the formal world (mathematics and computer science), and the figurative world (literature and sociology).

Physical Reflection: This refers to light rays hitting a surface and bouncing back or being projected. For example, the sunset 映射 on the glass of a skyscraper. It implies a certain brilliance or directness in the projection of light.
Mathematical Mapping: In set theory and computer science, 映射 is the standard term for 'mapping' or 'function.' It describes a rule that assigns each element of one set to exactly one element of another set. If you are discussing database relations or code architecture, this is the word you use.
Figurative Mirroring: This is where the word becomes truly poetic. It describes how one reality reveals or represents another. A novel might 映射 the struggles of a generation, or a person's facial expression might 映射 their inner turmoil.

晚霞的余晖映射在波光粼粼的湖面上，美不胜收。(The afterglow of the sunset reflects on the shimmering lake surface, beautiful beyond words.)

在数学中，我们研究集合 A 到集合 B 的映射关系。(In mathematics, we study the mapping relationship from set A to set B.)

这部电影深刻地映射了当代社会的阶级矛盾。(This film profoundly reflects the class contradictions of contemporary society.)

我们需要将虚拟内存映射到物理内存中。(We need to map virtual memory to physical memory.)

他的眼神里映射出内心的恐惧。(His eyes reflected the fear inside him.)

Understanding 映射 requires recognizing that it is not just 'reflection' in a mirror (which is often 倒映 or 反射), but a more systematic or logical projection. It suggests a 1-to-1 or many-to-1 relationship between an origin and a target. Whether it is a photon hitting a wall or a data point finding its place in a chart, 映射 captures the essence of correspondence.

Mastering 映射 involves understanding its grammatical role as a verb that often takes a prepositional phrase using 在...上 (zài... shàng) or 到...中 (dào... zhōng). Because it describes a movement or a relationship between two entities, the direction of the 'mapping' is crucial. Let's explore the syntax across different registers.

Structure: A 映射在 B 上: Used primarily for light and physical images. 'A' is the light source or image, and 'B' is the surface. Example: 阳光映射在雪地上。(Sunlight reflects on the snow.)
Structure: A 映射到 B: Used for technical and abstract contexts. This implies a transition or a logical link. Example: 将需求映射到功能模块。(Mapping requirements to functional modules.)
Structure: A 映射出 B: Used for figurative expressions where 'A' reveals or brings 'B' to light. Example: 这种现象映射出体制的弊端。(This phenomenon reflects the flaws of the system.)

In academic writing, 映射 is frequently paired with nouns like 关系 (relationship), 规则 (rule), or 过程 (process). It is a 'high-register' word, meaning you are more likely to find it in a textbook, a news editorial, or a technical manual than in a casual chat about what you ate for lunch. However, in the age of big data and algorithms, it is becoming increasingly common in professional conversations.

通过这种算法，我们可以实现多维空间向低维空间的映射。(Through this algorithm, we can achieve the mapping from high-dimensional space to low-dimensional space.)

他的作品中映射着他对故乡的深切思念。(His works reflect his deep yearning for his hometown.)

If you are a student in China or working in a tech-driven industry, you will hear 映射 constantly. It is a staple of the 'nerd' vocabulary but also the 'intellectual' vocabulary. Let's break down the specific environments where this word thrives.

In the Tech Office: Software engineers use it when talking about 'Object-Relational Mapping' (ORM) or mapping keys to values in a dictionary. You'll hear: '我们需要做一个数据映射' (We need to do a data mapping).
In University Lectures: Professors in math, physics, or sociology use it to describe relationships. A sociology professor might say, '城市的建筑布局映射了当时的权力结构' (The architectural layout of the city reflected the power structure of the time).
In Art Criticism: Critics use 映射 to explain how a piece of art connects to the real world. '这幅画映射了工业革命带来的焦虑' (This painting reflects the anxiety brought by the Industrial Revolution).

You might also encounter it in high-end nature documentaries. When the narrator describes the sun hitting the Himalayas, they won't just say 'the light is there'; they will use 映射 to give it a sense of grandeur and physical projection. It suggests a certain scale and intensity that simpler words like 照 (zhào) lack.

在网络配置中，确保端口映射正确才能访问内网服务器。(In network configuration, ensure port mapping is correct to access the internal server.)

Because 映射 can be translated as 'reflect,' English speakers often confuse it with other words that share this translation. Avoiding these pitfalls is key to sounding natural at the B2/C1 level.

Mistake 1: Using it for 'Reflection' in a Mirror: If you are looking at yourself in a mirror, do NOT use 映射. Use 照镜子 (zhào jìngzi) or 倒映 (dàoyìng) if it's an image in water. 映射 is about light being 'cast' or a 'mapping' between sets, not a literal mirror reflection.
Mistake 2: Confusing it with 反映 (fǎnyìng): 反映 is the most common word for 'to reflect' (e.g., reflecting an opinion, reflecting a situation). 映射 is more technical or formal. Use 反映 for feedback and 映射 for structural correspondence.
Mistake 3: Using it for 'Self-Reflection': You cannot '映射' on your mistakes. For personal introspection, the correct word is 反省 (fǎnxǐng) or 反思 (fǎnsī).

Incorrect: 我在镜子里映射了我的脸。
Correct: 镜子里映照着我的脸。(My face is reflected in the mirror.)

To use 映射 accurately, you must distinguish it from its close cousins in the 'reflection' family. Here is a comparison of synonyms and their specific nuances.

反映 (fǎnyìng): The general-purpose 'reflect.' Used for opinions, reality, or light. It is less technical than 映射 and focus on reporting or showing a state of affairs.
映照 (yìngzhào): Specifically for light shining on something. It has a more literary, aesthetic feel. 'The moon shines on the window' = 月光映照在窗户上.
反射 (fǎnshè): A physics term. It refers to the physical bouncing of light, sound, or heat. Also used for biological 'reflexes' (条件反射).
折射 (zhéshè): Literally 'refraction' (light bending). Figuratively, it means to reflect something in a distorted or specific way. 'The news refracts the public's bias.'

映射 focus: Systematic correspondence / Projection.
反映 focus: General reflection / Feedback.
反射 focus: Physical bounce / Automatic response.

How Formal Is It?

Wusstest du?

The character 射 (to shoot) originally looked like a bow and arrow. In 映射, the 'shooting' isn't an arrow, but photons or data points!

Aussprachehilfe

UK yìng shè

US yìng shè

Both syllables are stressed equally as they are both fourth tone.

Reimt sich auf

硬 (yìng) 庆 (qìng) 镜 (jìng) 命 (mìng) 色 (shè - phonetic) 射 (shè) 设 (shè) 社 (shè)

Häufige Fehler

Pronouncing 'she' as 'se'.
Using second tone for 'ying' (yíng).
Mixing up 'she' (shoot) with 'she' (society - 社).
Confusing 'ying' with 'yin' (sound).
Failing to make the tones sharp enough.

Schwierigkeitsgrad

Lesen 4/5

Requires understanding of both literal and abstract contexts.

Schreiben 4/5

Tricky to use correctly compared to simpler synonyms like 反映.

Sprechen 3/5

Pronunciation is straightforward, but finding the right context is key.

Hören 3/5

Common in technical and academic speech.

Was du als Nächstes lernen solltest

Voraussetzungen

反映照关系数学光

Als Nächstes lernen

对应变换同构投影折射

Fortgeschritten

范畴论 (Category Theory) 拓扑映射 (Topological Mapping) 同态 (Homomorphism)

Wichtige Grammatik

Prepositional phrases with '在...上'

阳光映射在湖面上。

Directional complement '出'

映射出内心的恐惧。

Resultative complement '到'

映射到另一个集合。

Noun modification with '的'

复杂的映射关系。

Verb-Object structure in IT

进行端口映射。

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Beispiele nach Niveau

阳光映射在水面上。

Sunlight reflects on the water surface.

Simple Subject + Verb + Prepositional Phrase.

灯光映射在墙上。

The light reflects on the wall.

映射 focus on the projection.

红光映射着他的脸。

Red light is reflecting on his face.

Using 着 (zhe) to indicate a continuous state.

雪地映射着阳光。

The snow reflects the sunlight.

Direct object relationship.

月光映射在窗户上。

Moonlight reflects on the window.

映射 used for soft light too.

火光映射在山洞里。

Firelight reflects inside the cave.

Spatial preposition '里' (inside).

色彩映射在画布上。

Colors reflect on the canvas.

Abstract light/color.

影子映射在地上。

The shadow reflects on the ground.

Though 投影 is more common for shadows, 映射 is possible.

这里的灯光映射出美丽的颜色。

The lights here reflect beautiful colors.

映射出 (reflect out) indicates the result.

他的眼睛映射着星光。

His eyes reflect the starlight.

Poetic usage.

湖水映射着蓝天。

The lake water reflects the blue sky.

Similar to 倒映.

电脑屏幕映射在眼镜上。

The computer screen reflects on the glasses.

Modern daily context.

阳光映射在每个角落。

Sunlight reflects in every corner.

Abstracting 'surface' to 'corner'.

夕阳映射着远处的山脉。

The sunset reflects on the distant mountains.

Descriptive landscape.

这种光芒映射出希望。

This glow reflects hope.

Intro to figurative meaning.

镜子里的光映射到地板上。

The light in the mirror reflects onto the floor.

Directional '到'.

数学中的映射是非常重要的概念。

Mapping in mathematics is a very important concept.

映射 as a noun/concept.

这篇小说映射了社会的现实。

This novel reflects the reality of society.

Figurative: reflecting reality.

我们需要建立一个数据映射表。

We need to create a data mapping table.

Technical B1 usage.

这种情绪映射在他的歌声中。

This emotion is reflected in his singing.

Abstract mapping of feelings.

城市的发展映射了国家的进步。

The city's development reflects the country's progress.

Macro-level reflection.

将每个字母映射到一个数字。

Map each letter to a number.

Verb usage in logic.

他的笑容映射出内心的喜悦。

His smile reflects the joy in his heart.

Inner to outer mapping.

阳光通过玻璃映射到室内。

Sunlight reflects into the room through the glass.

Through (通过) + 映射.

该算法实现了输入与输出的线性映射。

The algorithm achieves a linear mapping between input and output.

Technical precision.

这部作品深刻地映射了人性的复杂性。

This work profoundly reflects the complexity of human nature.

Literary analysis.

在数据库设计中，我们要处理对象映射。

In database design, we need to handle object mapping.

IT/CS terminology.

这种心理状态映射出他童年的阴影。

This psychological state reflects the shadows of his childhood.

Psychological depth.

我们需要将虚拟地址映射到物理地址。

We need to map virtual addresses to physical addresses.

Computer science context.

这种映射关系是一一对应的。

This mapping relationship is a one-to-one correspondence.

Mathematical term: 一一对应.

他的言行映射出他受过的良好教育。

His words and actions reflect the good education he received.

Behavioral mapping.

光线在不同介质中的映射效果不同。

The reflection effect of light is different in different media.

Scientific observation.

这种映射机制是该系统的核心组件。

This mapping mechanism is a core component of the system.

Structural noun '机制'.

诗歌中的意象映射了诗人对自由的渴望。

The imagery in the poem reflects the poet's longing for freedom.

Literary theory.

通过特征映射，我们可以提高模型的准确率。

Through feature mapping, we can improve the model's accuracy.

AI/Machine Learning context.

该政策的实施映射了政府治理能力的提升。

The implementation of this policy reflects the improvement of government governance capabilities.

Political science.

文化符号的映射往往具有多重含义。

The mapping of cultural symbols often has multiple meanings.

Semiotic analysis.

我们需要对这种复杂的映射过程进行建模。

We need to model this complex mapping process.

Academic research.

这种映射关系在不同的文化背景下有所差异。

This mapping relationship varies across different cultural backgrounds.

Cross-cultural study.

他的艺术风格映射了后现代主义的影响。

His artistic style reflects the influence of postmodernism.

Art history.

语言作为现实的映射，其局限性显而易见。

Language as a mapping of reality has obvious limitations.

Linguistic philosophy.

这种同构关系可以被视为两个范畴间的映射。

This isomorphic relationship can be seen as a mapping between two categories.

Advanced Mathematics/Logic.

该理论试图揭示意识与神经活动之间的映射规律。

The theory attempts to reveal the mapping laws between consciousness and neural activity.

Neuroscience/Philosophy of Mind.

历史的进程往往在文学作品中得到深层的映射。

The progress of history often finds a deep reflection in literary works.

Historiography.

这种映射不仅是形式上的，更是本体论上的。

This mapping is not only formal but also ontological.

High-level philosophical terminology.

在全球化背景下，身份认同的映射变得愈发复杂。

In the context of globalization, the mapping of identity has become increasingly complex.

Sociological theory.

我们需要审视这种映射背后隐藏的权力逻辑。

We need to examine the power logic hidden behind this mapping.

Critical theory.

这种映射的失真导致了认知的偏差。

The distortion of this mapping leads to cognitive bias.

Cognitive science.

Synonyme

反映反射对应折射

Gegenteile

吸收遮蔽

Häufige Kollokationen

数据映射

映射关系

一一映射

端口映射

内心映射

结构映射

线性映射

实时映射

内存映射

映射出

Häufige Phrasen

映射到

— To map something onto a target.

将需求映射到代码。

映射在

— To reflect on a surface (usually light).

阳光映射在水面。

反向映射

— Reverse mapping.

我们需要一个反向映射函数。

一对多映射

— One-to-many mapping.

这是一个典型的一对多映射。

动态映射

— Dynamic mapping.

系统会自动更新动态映射。

逻辑映射

— Logical mapping.

确定物理设备与逻辑映射的关系。

纹理映射

— Texture mapping (CG).

在3D建模中使用纹理映射。

地址映射

— Address mapping.

CPU负责地址映射。

映射表

— Mapping table.

查看映射表中的记录。

映射函数

— Mapping function.

定义一个简单的映射函数。

Wird oft verwechselt mit

映射 vs 反映

反映 is general (feedback/show); 映射 is specific (mapping/projection).

映射 vs 反射

反射 is physical bouncing (physics); 映射 is logical or light projection.

映射 vs 映照

映照 is purely about light shining; 映射 includes logical mapping.

Redewendungen & Ausdrücke

"如影随形"

— Like a shadow following a body; closely associated (related to the concept of reflection).

压力与成功往往如影随形。

Literary

"心领神会"

— To understand without words (an abstract mapping of minds).

他们两人配合默契，心领神会。

Neutral

"表里如一"

— External appearance matches internal reality (a perfect mapping).

他是一个表里如一的人。

Formal

"对号入座"

— To take one's seat according to the number (a literal 1-to-1 mapping).

请大家对号入座。

Neutral

"水落石出"

— The truth comes to light (a revelation/mapping of reality).

经过调查，真相终于水落石出。

Common

"杯弓蛇影"

— To be paranoid (a distorted mapping of a reflection).

他总是杯弓蛇影，自己吓自己。

Common

"顾影自怜"

— To look at one's reflection and feel sorry for oneself.

失恋后的她整天顾影自怜。

Literary

"波光粼粼"

— Shimmering water (the environment where 映射 often occurs).

湖面波光粼粼，非常漂亮。

Descriptive

"光怪陆离"

— Grotesque and variegated (complex mapping of lights).

大都市的夜生活光怪陆离。

Literary

"形影不离"

— Inseparable (shadow and body mapping).

他们俩是一对形影不离的好朋友。

Common

Leicht verwechselbar

映射 vs 反应

Sounds similar (fǎnyìng).

反应 is a reaction (chemical or human); 映射 is a mapping/reflection.

化学反应 (Chemical reaction) vs 数据映射 (Data mapping).

映射 vs 倒映

Both involve water/light.

倒映 is specifically an upside-down reflection in water; 映射 is broader.

山影倒映在湖里。

映射 vs 投影

Both involve projection.

投影 is usually a shadow or a technical projection (projector); 映射 is the relation.

投影仪 (Projector).

映射 vs 对应

Both mean matching.

对应 is the state of matching; 映射 is the action or rule of mapping.

对应关系 (Correspondence).

映射 vs 折射

Both are light terms.

折射 is bending through a medium; 映射 is shining on a surface.

光的折射 (Refraction of light).

Satzmuster

阳光映射在[Place]上。

阳光映射在草地上。

[Something]映射出[Emotion/Reality]。

他的眼神映射出不安。

将[A]映射到[B]。

将用户ID映射到姓名。

[A]与[B]之间存在映射关系。

这两个集合之间存在映射关系。

[Work of Art]映射了[Complex Concept]。

这本小说映射了后殖民主义的思潮。

通过[Method]实现映射。

通过算法实现特征映射。

[Concept]是[Reality]的映射。

符号是现实的映射。

这种映射的失真反映了[Problem]。

这种映射的失真反映了逻辑的缺陷。

Wortfamilie

Substantive

映射器 (Mapper)

映射表 (Mapping Table)

映射图 (Map/Graph)

Verben

映照 (Shine)

反射 (Reflect)

折射 (Refract)

Adjektive

映射性的 (Mapping-related)

Verwandt

变换 (Transformation)

函数 (Function)

投影 (Projection)

镜像 (Mirror image)

关联 (Association)

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So verwendest du es

frequency

Common in technical, academic, and literary contexts; rare in basic daily survival Chinese.

Häufige Fehler

我在镜子里映射自己。 → 我在镜子里照自己。
映射 is not for personal mirror use.
这个映射反映了我们的问题。 → 这个映射映射了我们的问题。(Or use 反映)
Don't confuse the noun and verb forms if you are trying to say 'reflect'.
映射我的错误。 → 反省我的错误。
映射 cannot mean 'to introspect'.
光映射在水里。 → 光映射在水面上。
Usually, light reflects ON (在...上) the surface, not inside.
一一反射。 → 一一映射。
In math, it's 'one-to-one mapping', not 'reflection'.

Tipps

Math Context

In math, always use 映射 for 'mapping'. It is the only correct term.

Literary Flair

Use 映射 instead of 照 to make your descriptions of nature sound more poetic.

Data Mapping

If you work in IT, learn '数据映射' (Data Mapping) and '对象映射' (Object Mapping).

Prepositions

Remember: 映射 + 在 (on) or 映射 + 到 (to).

Reflect vs Map

If you can replace 'reflect' with 'map' in English, use 映射 in Chinese.

Social Reflection

Use 映射 when discussing how a film reflects society; it sounds very intellectual.

Mnemonic

Ying (Reflect) + She (Shoot). Shooting a reflection onto something.

Tones

Both characters are 4th tone. Make them sharp!

Self-Reflection

Never use 映射 for thinking about yourself. Use 反思.

Isomorphism

At C2, 映射 is used to describe structural isomorphism (同构).

Einprägen

Eselsbrücke

Think of a projector 'shooting' (射) an image to 'reflect' (映) on a screen. 映 (Reflection) + 射 (Shoot) = Mapping/Projection.

Visuelle Assoziation

Visualize a laser beam hitting a mirror and bouncing to a specific spot on a wall. The beam 'shoots' and 'reflects'.

Word Web

Light Math Computer Reflection Function Logic Projection Set Theory

Herausforderung

Try to use 映射 in three different contexts today: once for light, once for data, and once for social reflection.

Wortherkunft

Composed of two characters: 映 (yìng) and 射 (shè). 映 consists of 日 (sun) and 央 (center/reflection), originally meaning light reflecting. 射 consists of 身 (body) and 寸 (hand/rule), originally meaning to shoot an arrow.

Ursprüngliche Bedeutung: The combination literally means 'to shoot or project a reflection/light.'

Sino-Tibetan (Chinese).

Kultureller Kontext

None. It is a neutral, formal term.

English speakers often use 'reflect' for everything. In Chinese, 映射 is more specific to 'mapping' or 'projection'.

Used in Chinese translations of 'Set Theory' (集合论). Commonly found in high-school and university math textbooks. Used in literary criticism of authors like Lu Xun.

Im Alltag üben

Kontexte aus dem Alltag

Mathematics

一一映射
映射函数
定义域
值域

Computer Science

对象关系映射
端口映射
内存映射
键值映射

Art/Literature

映射现实
内心映射
意象映射
时代映射

Physics/Optics

光线映射
折射映射
投影映射
漫反射

Sociology

权力映射
阶级映射
文化映射
结构映射

Gesprächseinstiege

"你觉得这部电影映射了哪些社会问题？"

"在数学课上，你学过映射这个概念吗？"

"我们需要讨论一下数据库的映射逻辑。"

"你看，晚霞映射在海面上多美啊！"

"这种心理状态是否映射了你童年的经历？"

Tagebuch-Impulse

写一段话描写夕阳映射在城市建筑上的景象。

讨论一下你认为语言是如何映射现实世界的。

描述一次你在工作中建立数据映射关系的经历。

分析一个你喜欢的文学人物，看看他映射了什么样的社会特质。

如果你能将你的梦想映射到现实中，那会是什么样子？

Häufig gestellte Fragen

10 Fragen

Technically you could describe light 映射-ing off a mirror, but for 'looking in a mirror,' use 照镜子. 映射 is more about the light hitting a surface than the image you see of yourself.

Yes, very frequently. It is the standard term for 'mapping,' such as mapping a URL to a controller or a key to a value in a dictionary.

It is '一一映射' (yī yī yìngshè).

It is '端口映射' (duānkǒu yìngshè).

Yes, it can mean 'the mapping' itself. Example: '这是一个复杂的映射' (This is a complex mapping).

Yes, 映射 sounds more technical and academic. 反映 is much more common in daily speech and general news.

No. While its origin is in light, its modern usage is heavily abstract (math, data, social reflection).

投影 (tóuyǐng) is usually a physical shadow or a mathematical projection onto a lower dimension. 映射 (yìngshè) is a more general mapping between sets.

Yes, if you say your feelings are 'reflected' in your art or actions. '我的画映射了我的悲伤' (My painting reflects my sadness).

Yes, it is typically introduced at the B2 level because of its abstract and technical applications.

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