hon rainwater drainage system 虹吸式雨水排水系统
roof rainwater drainage system 屋面雨水排水沟
siphonic rainwater drainage system 虹吸式雨水排放系统
gravitational rainwater drainage system 重力流系统
Forced Roof Rainwater Drainage System 上海科技馆屋面雨水压力流排水系统
The Liujiang is polluted because industries and the city drainage system directly discharge into it significant raw sewage and rainwater.
由于工业企业和城市排水系统直接向江中排放大量未经处理的污水和雨水，使柳江受到污染。
To resolve urban storm issues only through discharging in the past years, which resulted lots of rainwater flowing away through municipal drainage system.
解决城市暴雨问题，过去一味强调疏与排，这样做的结果是大量雨水从城市排水系统流走了。
A drainage basin is the area where these tributaries collect rainwater. A river with all its tributaries is called a river system.
流域是支流蓄水的区域。一条河流连同它的全部支流一起，叫做水系。
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