回答

・be not someone else's problem
・be not other people's business

be not someone else's problem 或 be not other people's business 可以用來表達「不是別人的問題」。

It seems that Mr. B was mistaken for a molester on a crowded train, but I'm not someone else's problem either.
（B先生似乎在擁擠的火車上被誤認為是性騷擾者，但不只是別人的問題。)

This is not other people’s business.
（這不是別人的問題。）

有幫助｜0