名词
中文翻译：排水区
同义词：
['drainage area', 'drainage system']
例句：
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1. The city has a large drainage area to handle the heavy rainfall.
这个城市有一个大的排水区来处理大雨。
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2. The construction of the new drainage system will greatly improve the water quality in the area.
新排水系统的建设将大大改善该地区的水质。
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3. The drainage area is designed to prevent flooding during heavy rains.
排水区的设计是为了在大雨时防止洪水。