英语词汇“a closed book”的翻译、意思、用法、释义-英汉汉英词典

单词	a closed book
释义	a closed book 完全不懂的学科；尚未揭开的秘密，不为人所知的事，无法理解的事(或人)；高深莫测的事物；谜以上来源于：《21世纪大英汉词典》
随便看	most (management operation system technique) most marvellous most marvelous most masculine most massive most material most mathematical most (maynard operation sequence technique) most mechanical most medieval most memorable most merciful god most metallic most--metal-oxide-semiconductor type field effect transistor most militant most miserable most mistaken most mobile most moderate most modern most modest most--modular office system terminal most monotonous most moral mos t--mos transistor