名词
中文翻译：下水道
同义词：
['municipal sewer', 'sanitary sewer']
例句：
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1.The city's common sewer system is in a state of disrepair.
城市的公共下水道系统处于损坏状态。
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2.The sewer workers were forced to clean up the common sewer after the storm.
暴风雨过后，下水道工人被迫清理了公共下水道。
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3. The city council has been working on improving the common sewer system.
市政委员会一直在努力改善公共下水道系统。