unring the bell
无法撤销、改变或忘记已经发生的事情
口语·表达无法挽回的遗憾
英文释义
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.
典故来源
源自物理常识：铃铛敲响后无法通过反向动作消除声音，比喻已发生之事不可逆转。