Necessity describes the quality of something that cannot be avoided or done without.
Word in 30 Seconds
- Refers to the state of being indispensable or required.
- Commonly used in formal arguments and professional discussions.
- Focuses on the logical reason for doing something.
常见语境：该词在正式场合非常普遍，如商务会议、学术论证或政策说明中。例如，在讨论公司预算时，经理会强调“削减开支的必要性”。在日常生活中，它也用于解释个人行为，如“我向他解释了学习外语的必要性”。
- 1近义词比较：与“重要性”（importance）不同，“必要性”侧重于“不可缺少”，即如果不做某事，后果是无法接受的；而“重要性”侧重于“价值高、影响大”。与“必需品”（necessity as an object）区别在于，必要性指属性，而必需品指具体的物品。
Examples
我向他解释了学习外语的必要性。
everydayI explained to him the necessity of learning a foreign language.
委员会正在审查该法规的必要性。
formalThe committee is reviewing the necessity of this regulation.
没必要这么麻烦吧？
informalIs it really necessary to go through all this trouble?
该研究论证了建立保护区的必要性。
academicThe study demonstrates the necessity of establishing a protected area.
Common Collocations
Common Phrases
有必要
It is necessary
没必要
Not necessary
毫无必要
Totally unnecessary
Often Confused With
Importance refers to value or significance, whereas necessity refers to the state of being required.
Inevitability refers to something that is certain to happen, while necessity refers to something that is needed.
Grammar Patterns
How to Use It
Usage Notes
The word is primarily used in formal, professional, or academic registers. In casual speech, native speakers often prefer using the verb phrase '有必要' (is necessary) or '必须' (must). It is almost always preceded by '的' to connect with the subject being discussed.
Common Mistakes
Learners often use '必要性' as an adjective, which is incorrect; it is a noun. For example, saying '这是非常必要性的' is grammatically wrong; it should be '这是非常有必要性的' or simply '这是非常有必要的'. Remember to keep it as a noun.
Tips
Focus on the logical connection
Always link 'necessity' to a specific goal or consequence. It helps to clarify why something is truly needed.
Avoid overusing in casual chat
Using this word in very casual settings might sound overly formal or stiff. Use '必须' instead for daily conversation.
Professional context in Chinese culture
In Chinese business culture, discussing the 'necessity' of a project is a polite way to challenge a proposal without being aggressive.
Word Origin
Derived from the classical Chinese concept of 必 (must) and 要 (want/need), combined with the suffix 性 to denote an abstract property.
Cultural Context
In Chinese culture, emphasizing the 'necessity' of an action is a way to show logical thinking and responsibility. It is highly valued in professional environments to justify decisions.
Memory Tip
Think of '必要' (must have) + '性' (nature). It is the 'nature of being a must'.
Frequently Asked Questions
4 questions必要性强调不可或缺，即如果不做就会出问题；重要性则强调价值和影响，即使不做也不一定会导致失败，但会产生负面影响。
在日常口语中，人们更倾向于直接说“必须做某事”。“必要性”这个词显得比较正式，更适合书面表达或严肃讨论。
你可以问自己：如果不做这件事，会有严重的后果吗？如果答案是肯定的，那么这件事就具有必要性。
通常加“的”，即“……的必要性”。例如：改革的必要性、沟通的必要性。
Test Yourself
我们必须重新评估这个项目存在的___。
根据语境，评估项目是否应该继续存在，应使用必要性。
“我们讨论了增加人手的必要性。”这句话的意思是：
必要性指必须做某事的理由。
的 / 我们 / 学习 / 认识到 / 电脑技术 / 必要性
标准的中文主谓宾结构。
Score: /3
Summary
Necessity describes the quality of something that cannot be avoided or done without.
- Refers to the state of being indispensable or required.
- Commonly used in formal arguments and professional discussions.
- Focuses on the logical reason for doing something.
Focus on the logical connection
Always link 'necessity' to a specific goal or consequence. It helps to clarify why something is truly needed.
Avoid overusing in casual chat
Using this word in very casual settings might sound overly formal or stiff. Use '必须' instead for daily conversation.
Professional context in Chinese culture
In Chinese business culture, discussing the 'necessity' of a project is a polite way to challenge a proposal without being aggressive.
Examples
4 of 4我向他解释了学习外语的必要性。
I explained to him the necessity of learning a foreign language.
委员会正在审查该法规的必要性。
The committee is reviewing the necessity of this regulation.
没必要这么麻烦吧？
Is it really necessary to go through all this trouble?
该研究论证了建立保护区的必要性。
The study demonstrates the necessity of establishing a protected area.
Related Content
This Word in Other Languages
Related Vocabulary
More academic words
缺席
B1The state of being absent from a place or event where one is expected to be, such as a class, meeting, or ceremony.
抽象的
A2Abstract.
抽象地
B1In an abstract manner; conceptually.
艰深
B1Profound; abstruse; recondite.
学术性
A2Academic; scholarly; relating to education and scholarship.
学术化
B1Academic; characterized by formal study or research.
学术会议
A2Academic conference; a formal meeting for academic discussions.
学术交流
B1Exchange of ideas, information, and research among scholars.
学术期刊
B1A periodical publication containing scholarly articles.
教务处
A2Academic affairs office; department handling educational administration.
