名词污物处理（系统）
1. 下水：sewer pipe 下水管 | sewerage 下水 | sewerage filter 污水滤池
2. 污水渠：sewer 污水管 | sewerage 污水渠 | sewerage connection proposal 污水渠接驳建议书
3. 排水设备：sewer 阴沟 | sewerage 排水设备 | sewing circle 妇女缝纫小组
4. 下水道：sewage treatment plant 污水处理工厂 | sewerage 下水道 | sewing machine 缝纫机
1. 排水系统;下水道系统;污水处理系统
Sewerage is the system by which waste matter is carried away in sewers and made harmless.
e.g. The town has already put in a proper sewerage system.
小镇已经安装了合理的污水处理系统。
e.g. ...without access to any services such as water or sewerage.
不能享受任何诸如供水或污水处理之类的服务