名词
中文翻译：下水道附件
同义词：
['sewage appurtenances', 'sewer fixtures']
例句：
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1. Thecity has been working on improving its sewer system to reduce the amount of wastewater entering the environment.
该市一直在努力改善其下水道系统，以减少进入环境的废水量。
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2. The new sewer appurtenances are designed to be moreenergy-efficient and environmentally friendly.
新的下水道附件设计得更节能和环保。
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3. The constructionof the new sewer system will requirethe installation of several new sewer appurtenances.
新下水道系统的建设将需要安装几个新的下水道附件。