cry over spilt milk
为不可更改的事情而懊悔或感到难过
口语·劝人不要为过去的事懊悔
英文释义
to lament or grieve over something that has already happened and cannot be changed
例句
I know you're upset about the mistake, but there's no use crying over spilt milk.
典故来源
源自17世纪谚语，强调牛奶洒了再哭泣也无济于事，比喻对已发生且无法挽回的事懊悔无用。