fall behind in

• v. 在 ... 方面落后

fall behind in的用法和样例：

例句

1. Soon he fell behind in the race.
   不久他就跑在后头了。
2. The major world powers are afraid of falling behind in the arms race.
   世界各大强国均惟恐在军备竞赛中落後。
3. I have fall behind in my work since last week.
   从上周起，我在工作中落后了。