a closed book

 
       
  • 未揭开的秘密,高深莫测的谜

a closed book的用法和样例:

例句

  1. Fishing is a closed book to me.
    我对钓鱼是一窍不通。
  2. Nuclear physics is a closed book to me.
    核物理学是我完全不懂的一门学科。
  3. Nuclear physics is a closed book to most of us.
    我们大多数人对原子核物理学一窍不通。

a closed book的海词问答与网友补充:

提问补充

a closed book的相关资料:

正版词典

a closed book : 无法理解的 ...
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