充要

1.
necessary sufficient
因此,起源的概念对我们就仅仅意味着区分相对于文化的前文化(pre-culture)活动的起码的充要necessary sufficient)条件。如果我 …
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Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard