to fall behind
[phrase form: fall]
01
落后, 跟不上
to fail to keep up in work, studies, or performance
Intransitive
Transitive: to fall behind a competitor
例子
The company fell behind its competitors in AI research
该公司在人工智能研究方面落后于竞争对手。
He began to fall behind in class after missing several lessons.
在错过几节课后，他开始在课堂上落后。
02
拖欠付款, 积累债务
to owe money due to not paying when required
Intransitive
例子
They 've fallen behind on their mortgage.
他们的房贷拖欠了。
I 'm starting to fall behind on credit card bills.
我开始在信用卡账单上落后了。
