n.排水；排水系统；污水；【医】引流（法），导液（法）
Bad drainage caused the land to be flooded. 排水不利容易使土地淹水。
The drainage system has been aged. 排水系统已经老化了。
The town's drainage is very efficient. 这城市的排水系统很好。
He came to look at the drainage. 他是来检查排水设备的。
The city was even equipped with a drainage system, for a great many clay pipes were found beneath the narrow streets. 这座城市甚至还铺设过排水系统,因为在窄窄的街道底下发现了许多陶土制的管道。
Never pipe the discharge line directly into a drainage ditch, sewer or sump. 不要把排泄管直接插入排泄地漏、污水管或污水坑里。
