落后于

例句：

1. 1. The team is lagging behind the competition in terms of performance.
   该队在性能方面落后于竞争对手。
2. 2.The economy is lagging due to a lack of investment.
   经济因缺乏投资而落后。
3. 3.The company's sales have been lagging compared to last year.
   该公司的销售额与去年相比有所下降。