a closed book

From Longman Dictionary of Contemporary Englisha closed booka closed bookUNDERSTANDa subject that you do not understand or know anything about Chemistry is a closed book to me. → bookExamples from the Corpusa closed book• But your own past can be a closed book, even at fourteen.• The Shoah will never be a closed book.• He is holding a closed book, signifying a mystery, possibly a stage in the alchemical process.• The kitchenette is a closed book.• Linear preoccupation in the past remains a closed book to modern understanding.• I tell myself it's a closed book, but my cover story becomes an old man's compensation.• I can not believe that it can be right that this late in the game Poetry is still a closed book.• The highly organised St Stephen's Society programme which she now leads was at that time a closed book to her!

单词	a closed book
释义	a closed book From Longman Dictionary of Contemporary Englisha closed booka closed bookUNDERSTANDa subject that you do not understand or know anything about Chemistry is a closed book to me. → bookExamples from the Corpusa closed book• But your own past can be a closed book, even at fourteen.• The Shoah will never be a closed book.• He is holding a closed book, signifying a mystery, possibly a stage in the alchemical process.• The kitchenette is a closed book.• Linear preoccupation in the past remains a closed book to modern understanding.• I tell myself it's a closed book, but my cover story becomes an old man's compensation.• I can not believe that it can be right that this late in the game Poetry is still a closed book.• The highly organised St Stephen's Society programme which she now leads was at that time a closed book to her!
随便看	it is polite of to do it is polite to do it is politic to do it is politic to do something it is possible it is possible (that) it is possible that it is pouring rain it is practicable (for somebody) to do something it is practicable for to do it is practicable to do it is premature (for somebody) to do something it is premature for to do it is premature to do it is probable it is probable (that) it is probable that it is proper (for somebody) to do something it is proper for to do it is proper to do it is prudent (for somebody) to do something it is prudent for to do it is prudent to do it is questionable whether it is rare (for somebody/something) to do something