closed-book test不可看书的考试
closed-book关闭书;难理解的事
He Closed The Book他合起书
And Closed My Book并关闭我书
closed-book exam闭卷;闭卷考试
Snapped closed the book surface啪的合上书面
like a closed book被迫有趣
Closed book to me象天书一样
A Closed Book合上的书;高深莫测的事物;未揭开的秘密;不理解的事
同义词:mysteryenigmasecret