ONE PHRASE, IN CONTEXT
back out
退出约定;打退堂鼓

GET TO KNOW THE MEANING
同一个表达,不同的语境。
01退出约定;打退堂鼓
IN A SENTENCE
I promised to drive them to the station, so I can't back out at the last minute.
我答应开车送他们去车站,所以不能临时反悔。
02退出;食言;打退堂鼓
IN A SENTENCE
He backed out of the agreement at the last minute, leaving the whole team without a venue.
他最后一刻退出了协议,害得整个团队都没有场地。
