你知道吗？book也是有习语的

英语自学网

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        1.a closed book  鲜为人知高深莫测的事；不熟悉的人或物
        Skiing is a closed book to me.
        我对滑雪是一窍不通。
        His early life is a closed book.
        他的早年生活是个不可告人的谜.
        2.an open book 与第一个习语相反，这个短语表示“众所周知的事或毫无秘密的事”
        They have no secrets. He is like an open book to her.
        他们之间没有秘密，他对她毫无秘密。
        3.do something by the book/go by the book  按规矩做事，循规蹈矩地做事
        There is nothing really wrong to go by the book.
        一切照规章行事，没有不对的地方。
        She does everything by the book.
        她做事循规蹈矩，小心谨慎。
        4.read someone like a book  看透某人的想法
        She couldn't tell a lie if she wanted to. You can always read her like a book.
        她想说谎都不行。你总是可以轻易看透她。
        I know what he'll probably do. I can read him like a book.
        我知道他可能会干什么，我对他了如指掌。
        His lie was nailed to the counter cause his mother read him like a book.
        他的谎言被揭穿了，因为他妈妈太了解他了。