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English definition of “know what you are talking about”

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know what you are talking about

C1 to understand a subject because of your experience: He doesn't know what he's talking about - he's never even been to Africa.
Translations of “know what you are talking about”
in Chinese (Traditional) 作經驗之談…
in Chinese (Simplified) 作经验之谈…
(Definition of know what you are talking about from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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