A closed book
Manage episode 437217928 series 2156965
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。
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