gain drift

例句：

1. 3.
   在物理学中
2. 1. The boat drifted aimlessly in the sea.
   这艘船在海上漫无目的地飘荡。
3. 2. The team gained momentum after their first victory.
   球队在首胜后获得了动力。
4. 3. The economy is gaining momentum as the government invests more in infrastructure.
   随着政府加大对基础设施的投资，经济正在增长。