英语词汇“closed book”是什么意思，“closed book”的读音、用法及例句翻译-烛光网

词汇	closed book
释义	closed bookn.（名词） A person or thing that cannot be known or understood; something unfathomable or puzzling.完全不懂的人，不了解的事：无法认识或了解的人或物；深不可测或迷惑不解的东西
随便看	piezometer pie–dog pie–eyed piffle piffled piffles piffling pig pig pig bed pigboat pigeon pigeon pigeon pigeon breast pigeoned pigeon hawk pigeonhole pigeonholed pigeonholes pigeonholing pigeoning pigeon pea pigeons pigeon-toed

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