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English definition of “missing link”

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missing link

noun [S] uk   us  
something that is necessary to complete a series or solve a problem: Those documents provided the missing link, and the police were able to make an arrest soon after they discovered them.the missing link an animal that no longer exists or might never have existed and is thought to explain how humans developed from apes
Translations of “missing link”
in Chinese (Traditional) (一系列相關聯事物中)必要的環節…
in Chinese (Simplified) (一系列相关联事物中)必要的环节…
(Definition of missing link from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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