closed book
n. 不为人知的人或事, 无法解释的事物
例句与用法：
Fishing is a closed book to me.
我对钓鱼是一窍不通。
Nuclear physics is a closed book to me.
核物理学是我完全不懂的一门学科。
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。
closed book
n. 不为人知的人或事, 无法解释的事物
例句与用法：
Fishing is a closed book to me.
我对钓鱼是一窍不通。
Nuclear physics is a closed book to me.
核物理学是我完全不懂的一门学科。
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。
closed book
同义词：
over | exclusive | private | accomplished | shut | locked | bolted | impassable | inaccessible | blocked | obstructed | settled | decided | narrow-minded | closed-minded | prejudiced | bigoted | restricted | limited | unsympathetic | unopen | closed in |
反义词：
open |
closed bookclosed bookn.1.翻译：一无所知的东西，已结束的事(计划、行动等)
closed book
1.翻译：[口语]
2.翻译：无法理解的天书，不可捉摸之物，深
closed book
名词 closed book:
something that baffles understanding and cannot be explained
同义词：mystery, enigma, secret