be at your wits' end idiom
(因为非常担忧、迷惘或恼火而)不知道下一步该怎么办
to be so worried, confused, or annoyed that you do not know what to do next
I'm at my wits' end. I don't know how to help him. 我已经没办法了,不知道该怎么帮他。
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