落后者

例句：

1. 1. The team is lagging behind the competition in terms of performance.
   该团队在性能方面落后于竞争。
2. 2.He was lagging behind his classmates in mathematics.
   他在数学上落后于同学们。
3. 3. The economy is lagging because of the lack of investment.
   由于缺乏投资，经济正在落后。