1
be a closed book to sb
表示某人对某事物完全不了解。
This subject is a closed book to me.
这个科目对我来说是一无所知的东西。
完全未知的事物；不了解的人或事
closed books — plural of closed book
先理解核心含义，再看它在真实句子里的用法。
完全未知的事物；不了解的人或事
Someone or something about which you know nothing; a complete mystery.
This subject is a closed book to me.
这个科目对我来说是一无所知的东西。
难以理解的人或事物；不可理解或令人困惑的人或事物
A person or thing that cannot be easily understood; someone or something incomprehensible or puzzling.
Quantum physics is a closed book to me.
量子物理学对我来说完全是个未知领域。
The new software was a closed book for many older employees.
这款新软件对许多老员工来说完全是陌生的。
These ancient languages are closed books to most people.
这些古老的语言对大多数人来说完全看不懂。
表示某人对某事物完全不了解。
This subject is a closed book to me.
这个科目对我来说是一无所知的东西。
表示某事已经完结，不再讨论。
That project is now a closed book.
那个项目现在已经结束了。
强调从某种状态转变为了结或未知。
After the divorce, the past became a closed book.
离婚后，过去的事就成了封存的事情。
Not this
This subject is a close book to me.
Use this
This subject is a closed book to me.
误用动词原形'close'代替过去分词'closed'作形容词；'closed book'是固定短语，'closed'不可替换为原形。
Not this
This subject is a closed book for me.
Use this
This subject is a closed book to me.
介词搭配错误；'a closed book'后接介词'to'表示'对……而言'，而非'for'。
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use closed books naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.