closed book中文什么意思

未知之事，不可理解的事情。

• closed:    adj. 1.关闭着的，封闭着的；密 ...
• book:    n. 1.书，书籍；著作； 〔the ...
• a closed book:    谜, 未揭开的秘密 高深莫测的事物; ...

例句与用法

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1. The man's early life is a closed book .
   那人的早年生活是个不可告人的谜。
2. 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。
3. For me , geology is a closed book
   对我来说地质学是一门我完全不懂的学科。
4. Nuclear physics is a closed book to me
   核物理学是我完全不懂的一门学科。
5. Paper i : choose 2 questions and answer in 3 hours . closed book
   卷一：以三小时选答两条题目(闭卷)

英文释义

名词

1. something that baffles understanding and cannot be explained; "how it got out is a mystery"; "it remains one of nature''s secrets"
   同义词：mystery, enigma, secret