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Equivalence is the state of counting as the same for a purpose, even when two things are not the same kind of thing. A school may say a foreign exam has equivalence with a local one: it is not the same test, but they treat it as doing the same job. Two tools can have equivalence if they get the same work done.
Equivalence is the state of counting as the same for a purposeEquivalence（對等）指的是，為了某個目的，把兩樣東西當成一樣看待的狀態 even when two things are not the same kind of thing就算它們本來不是同一種東西。A school may say a foreign exam has equivalence with a local one學校可能會說某個外國考試跟本地考試有equivalence（對等關係） : it is not the same test, but they treat it as doing the same job：不是同一個測驗，但學校把它們當成做同一件事。Two tools can have equivalence兩樣工具也可以說它們有equivalence if they get the same work done如果能完成同樣的工作。
Equality is “the same.” Equivalence is “good enough to stand in for each other here.” In maths, logic, and chemistry the word gets a tighter, more technical life, though actually everyday English still uses the looser idea: these can take each other’s place for this job.
Equality is "the same."Equality（相等）是『完全一樣』。Equivalence is "good enough to stand in for each other here."Equivalence是『在這裡好到可以互相取代』。In maths, logic, and chemistry the word gets a tighter, more technical life在數學、邏輯和化學裡，這個字會有比較嚴謹、技術性的用法 though actually everyday English still uses the looser idea不過其實日常英文還是常用比較鬆的概念 : these can take each other's place for this job：這些東西在這件事上可以互相取代。
It is a school-and-office word more than a kitchen-table word.
It is a school-and-office word這比較是學校和辦公室會用的字 more than a kitchen-table word不是餐桌上聊天會用的字。
組成From French équivalence, from Medieval Latin aequivalentia. Built on the same pieces as equivalent: equal + being worth, then -ence for the state of that.
同家族的字
- equivalentequivalence is the noun for equivalent
- equalboth carry the Latin “equal” piece
原始詞典資料8 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
equivalencenoun/ɪˈkwɪv.ə.ləns/
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The condition of being equivalent or essentially equal.
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mathematicssciencesAn equivalence relation; ≡; ~
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human-scienceslogicmathematicsThe relationship between two propositions that are either both true or both false.
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chemistrynatural-sciencesphysical-sciencesThe quantity of the combining power of an atom, expressed in hydrogen units; the number of hydrogen atoms can combine with, or be exchanged for; valency.
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mathematicssciencesA Boolean operation that is TRUE when both input variables are TRUE or both input variables are FALSE, but otherwise FALSE; the XNOR function.
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geometrymathematicssciencesA number in intersection theory. A positive-dimensional variety sometimes behaves formally as if it were a finite number of points; this number is its equivalence.
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human-scienceslinguisticssciencesThe degree to which a term or text in one language is semantically similar to its translated counterpart.
equivalenceverb/ɪˈkwɪv.ə.ləns/
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To be equivalent or equal to; to counterbalance.
- […] whether the transgression of Eve seducing, did not exceed that of Adam seduced, or whether the resistibility of his reason did not equivalence the facility of her seduction, we shall referre it unto the Schoolman.
- […] every one being struck with wonder at the vertue and patience of the sufferers, began to think that worthy the enquiring into, which men thought so much better worth then their lives; and these reflections converted more then the best verball expressions, to such auditors, as thought life not to be equivalenced by any compensation.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。