名词
中文翻译：回水水平面
同义词：
['backflow level', 'backflow level', 'backwater level']
例句：
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1. The river's backwater level has been rising steadily since last year.
这条河的回水水平自从去年以来一直在稳步上升。
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2. The engineer used a device to measure the backwater level of the reservoir.
工程师使用了一种装置来测量水库的回水水平。
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3. The backwater level is critical for maintaining water quality in the lake.
回水水平对于保持湖泊水质至关重要。