water fast

例句：

1. 1.The river flows swiftly through the valley.
   这条河在山谷中流得很快。
2. 2. The ship sailed swiftly across the ocean.
   那艘船迅速穿过了大海。
3. 3. The fisherman had to paddle swiftly to reach his boat.
   渔夫不得不迅速划桨才能到达他的船。