名词
中文翻译：排水
同义词：
['discharge', 'drain', 'flush', 'effluent', 'wastewater']
例句：
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1. The factory discharges a lot of pollutants into the river.
这家工厂向河流排放了大量的污染物。
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2. The sewer system is designed to efficiently drain the city's wastewater.
下水道系统设计用来高效地排放城市的废水。
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3. The farmers need to ensure that their farmland is properly drained before planting crops.
农民需要确保他们的农田在播种前得到适当的排水。