名词
中文翻译：下水道
同义词：
['drain', 'sewer', 'drainpipe']
例句：
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1. The city has a large network of subterranean tunnels and drainage systems.
这个城市有一个巨大的地下隧道和排水系统网络。
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2. The engineer designed the new sewer system to handle the increased traffic.
工程师设计了新的排水系统来处理增加的交通量。
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3. The construction crew was working diligently to clear the drainage pipe for the new road.
施工队伍正在努力清理新道路的排水管。