swift particle

例句：

1. 1. The swift river flows through the forest.
   这条快速的小河穿过森林。
2. 2. She moved quickly to catch up with him.
   她迅速移动以赶上他。
3. 3. The swift changes in the weather are unpredictable.
   天气的迅速变化是不可预测的。