Word · Frequency #8842
reciprocal
倒数；乘法逆元
核心释义
A number related to another in such a way that their product is 1; for a fraction, the result of swapping its numerator and denominator.
- 1.
用1除以另一个给定数所得的数；分数分子分母互换的结果。
The number obtained by dividing 1 by another given number; the result of exchanging the numerator and the denominator of a fraction.
- 2.
与其他事物具有互惠关系的事物(术语、表达或概念)
something (a term or expression or concept) that has a reciprocal relation to something else
- 3.
表示相互动作的结构。
A construction expressing mutual action.
- 4.
(数学)一对乘积为1的数字中的一个:2/3的倒数是3/2；7的乘法逆元是1/7
(mathematics) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2; the multiplicative inverse of 7 is 1/7
- 5.
涉及一对交配的杂交,反转与每种基因型相关的性别
hybridization involving a pair of crosses that reverse the sexes associated with each genotype
互惠的事物；相互对应的事物；相互结构；互指结构；正反交；用1除以另一个给定数所得的数；分数分子分母互换的结果。；与其他事物具有互惠关系的事物(术语、表达或概念)
用法In use
In mathematics, the reciprocal of 3 is 1/3.
用法提示：名词用法，表示数学中的倒数。
Their friendship is built on a reciprocal of trust and support.
用法提示：名词用法，表示互惠的事物或关系。
The new agreement provides a reciprocal of benefits for both companies.
用法提示：名词用法，表示互惠的事物。
risk is the reciprocal of safety
the reciprocal of [number]
用于数学语境，表示一个数的乘法逆元。
The reciprocal of 2/3 is 3/2.
2/3 的倒数是 3/2。
a reciprocal of [something]
表示两个事物之间存在相互或互惠关系。
相关词与表达Connections
搭配Collocations
- reciprocal of a number
- 一个数的倒数
- The reciprocal of 0.5 is 2.0.5的倒数是2。
- reciprocal of a fraction
- 一个分数的倒数
- To divide by 2/3, multiply by its reciprocal, 3/2.要除以2/3，乘以其倒数3/2。
- find the reciprocal
- 求倒数
- Find the reciprocal of 7.求7的倒数。
- reciprocal cross
- 反交（涉及性别反转的杂交）
- The reciprocal cross showed different inheritance patterns.反交显示出不同的遗传模式。
- reciprocal relationship
学习提示Learner notes
记忆技巧Memory Tip
想象两人互相交换礼物：你送我一个，我回送你一个——这就是reciprocal（互惠关系）。数学上，2/3的倒数是3/2，互相颠倒且乘积为1，也是reciprocal。
语境与语域Context & Register
语域：mixed 常见场景：数学、生物学、一般互惠关系 该词在不同专业领域（数学、生物学）和一般互惠关系中使用，语域通常偏正式或中性，因此标记为混合语域。
语法说明Grammar Note
复数形式reciprocals；可指数对中的一个或互惠关系的事物。
发音与拼写Pronunciation & Spelling
These words all end in the suffix '-cal', pronounced /kəl/. However, the stressed vowel and preceding consonants differ, so they do not rhyme with each other or with 'reciprocal'.
用法优先级Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.