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English definition of “necessary evil”

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necessary evil

noun [C] uk   us  
something unpleasant that must be accepted in order to achieve a particular result: I think he regards work as a necessary evil. Most Americans accept taxes as a necessary evil.
Translations of “necessary evil”
in Chinese (Traditional) 不想做但必須做的事, 不得不接受的事…
in Chinese (Simplified) 不想做但必须做的事, 不得不接受的事…
(Definition of necessary evil from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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