难以理解的事物或谜团
... 冻顶乌龙 » Goes against Wu Long frozen 关上书 » closed book 要什么时候我才能忘记你！ » When I can to forget you! ...
娘家寡情休书(Closed Book)送，你脑子里东西的多寡，就关系着你将来的前途。
... cloak-and-dagger 有关阴谋或间谍的... closed book 不为人知的人或事... occult 不可思议的 ...
Frank Spriggs was a very able man but something of a closed book.
弗兰克· 斯普里格斯是个非常能干的人，却不被人所知晓。
A small part of the shadow with jildi closed book caught in the inside, will be a short trip.
一小部分的影子随着忽忙合上的书本被夹在了里面，这将是一场短途的旅行。
Fishing is a closed book to me.
我对钓鱼是一窍不通。
And other classes are completely closed book. You can't bring anything into it, even a calculator, so.
而有些课的考试是完全闭卷考试。考试时什么都不能带，甚至计算器都不行。
SpeakingMax英语口语达人 : 考试应该这么准备
Who can possibly remain a closed book, when others try to open it and leaf through?
But diplomats and other foreign observers admit that the army is a closed book to outsiders.
This election may have closed the book on a Vietnam veteran ever being elected president.