滚雪球

例句：

1. 1.The company's profits are steadily rolling upwards.
   公司的盈利正在稳步上升。
2. 2.The project is gradually rolling out across the country.
   该项目正在全国各地逐步展开。
3. 3. The economy is slowly rolling back to its pre-pandemic levels.
   经济正在缓慢恢复至疫情前的水平。