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used to say that one does not know the answer to a question
常被人们用来表达他们并不知道这个问题的答案;别问我(我不知道)
A: Why are they having a company meeting?
他们为什么要开公司会议?
B: Don't ask me. That's her department.
这事别问我—那是她的职责范围。
Don't ask me where you've left your glasses!
我哪知道你自己把眼镜放哪儿了!