fall behind
US
UK fall behind vi phrasal: figurative (fail to keep up)
SC 落后 luò hòu
TC 落後
TC 落後
If I don't study for two hours every night, I risk falling behind with my class work.
如果每晚不学习两个小时，我就有可能会落下课业。
fall behind vi phrasal: (fail to maintain pace)
SC 落后 luò hòu
TC 落後
TC 落後
The runner started falling behind when he twisted his ankle two miles into the race.
在跑了两英里后，赛跑者扭伤了脚踝，开始落后了。