动词短语
中文翻译：倒流
同义词：
['backflow', 'flow backwards例句：1. The river is flowing back towards the source.（这条河正在向源头倒流。）']
例句：
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1. The river is flowing back towards the source.
这条河正在向源头倒流。
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2. The water was flowing backwards when the valve was closed.
当阀门关闭时，水流是向后倒流的。
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3. The floodwaters were flowing backwards as they approached the town.
洪水正流向小镇。