名词
中文翻译：自流
同义词：
['self-flow', 'autonomous flow', 'self-propelled flow']
例句：
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1. The riverautoflows through the valley.
这条河流在山谷中自行流淌。
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2. The autoflow of the river is a natural wonder.
河流的自流是一种自然的奇观。
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3.The autoflow of the river has been studied for its impact on the environment.
河流的自流对环境的影响已经得到了研究。