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A closed book - episode of 日常英语口语 Spoken English podcast

A closed book

47 seconds Posted Jan 16, 2019 at 1:58 am.
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a closed book完全不了解,搞不懂

closed adj. 关闭的;合上的


与an open book意思相反


He issuch a closed book, he never talks about himself.他这人很封闭,从来不谈论他自己。


I don’t know much about Economics,it is a closed book to me. 我不太懂经济学,对我来说就像天书一样。