名词
中文翻译：回流
同义词：
['reflux', 'backwash例句：1. The water in the river is flowing back towards the source.（河水正在向源头回流。）']
例句：
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1. The water in the river is flowing back towards the source.
河水正在向源头回流。
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2.The chemical reaction caused a backflow of gas into the container.
化学反应导致气体逆流进入容器。
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3. The backflow of sewage can contaminate the environment.
污水的逆流可以污染环境。