unring the bell
無法撤銷、改變或忘記已經(jīng)發(fā)生的事情
口語·表達(dá)無法挽回的遺憾
英文釋義
undo or reverse something that has already been done; impossible to undo or reverse something
例句
I accidentally sent the email to the wrong person. I wish I could unring the bell, but it's too late.
典故來源
源自物理常識：鈴鐺敲響后無法通過反向動作消除聲音，比喻已發(fā)生之事不可逆轉(zhuǎn)。