saved by the bell
乘時救援
口語·最后時刻脫困
英文釋義
to be rescued or helped at the last possible moment
例句
I was saved by the bell when the phone rang during my speech.
典故來源
源自拳擊比賽，鈴聲結束回合可避免被擊倒；也指葬禮中防止活埋的鈴鐺。