名词
中文翻译：逆流
同义词：
['counterflow', 'inflow', 'outflow']
例句：
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1.The river flows backwards towards the sea.
这条河逆流向大海。
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2. The air is flowing backwards because of the strong winds.
由于强风，空气正在逆流。
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3.The water flows backwards as it enters the drain.
水进入排水沟时是逆流的。