fallen behind

• v. 落后(拖欠)

fallen behind的用法和样例：

例句

1. France has fallen behind (Germany) in coal production.
   法国在产煤方面落後(於德国)了。
2. Hanging back or falling behind; dilatory.
   畏缩不前的或落后的; 迟误拖拉的
3. I've fallen behind with my correspondence.
   我积压了许多信没回。
4. I have fall behind in my work since last week.
   从上周起，我在工作中落后了。