Urban sewer system has its own carrying capacity. Urban is considered as a whole organism.
城市排水系统有其自身的承载能力，城市作为一个完整的生命体，各个器官和组织的承载能力都有限度，排水系统也是如此。
参考来源 - 城市雨水排水系统健康状况研究·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
But, he added, "there's got to be ways of inspecting the sewer system."
但是，他补充说，“必须找到办法检查下水道系统。”
This dissertation is to develop a late-model sewer system named vacuum sewer system.
本文旨在开发一套新型真空下水道系统。
Today in most large cities, water is used only once and then sent out into a sewer system.
今天在大多数的大城市里，水仅仅被用过一次，之后就被送到了下水道。
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