| 词汇 | a closed book |
| 释义 | a closed book : a person or thing that is difficult to understand难以理解的人（或事物） Even to his closest friends, he was always something of a closed book.甚至对于他最亲密的朋友来说，他也总是有点像谜一样。 — compare an open book (below) book |
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英汉双解词典包含93607条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。