回流

例句：

1. 1. The river has swollen to a dangerous level due to heavy rains.
   由于大雨，河流已经涨到危险的水位。
2. 2. The team needs to return to their base camp for further training.
   队伍需要回到基地营地进行进一步的训练。
3. 3. The old man returned home after a long trip.
   这位老人在长途旅行后回到了家。