rapid stream

例句：

1. 1. The car accelerated to a rapid speed.
   汽车加速到了一个快速的速度。
2. 2. The river flows rapidly through the valley.
   这条河在山谷中快速流动。
3. 3. Rapid changes in weather can cause problems for farmers.
   天气的快速变化会给农民带来问题。