名词
中文翻译：逆流循环
同义词：
['counter-flow', 'reverse flow']
例句：
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1.The water in the river is flowing in the opposite direction to what it normally does.
河水在向相反方向流动，与通常的流向不同。
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2. In this experiment, we observed a reverse circulation of gases.
在这个实验中，我们观察到气体的逆流循环。
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3. The engineer designed a system to reverse the circulation of pollutants in the environment.
工程师设计了一个系统，用于逆转环境中污染物的循环。