cry over spilt milk
為不可更改的事情而懊悔或感到難過
口語·勸人不要為過去的事懊悔
英文釋義
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.
典故來源
源自17世紀諺語，強調牛奶灑了再哭泣也無濟于事，比喻對已發生且無法挽回的事懊悔無用。