drainage

1. [U]排水,放水 the act or action of draining
2. [U]排水系统,下水道 system of drains
3. [U]废水,污水,污物 sth that is drained off

• improve the drainage改善排水系统

• the drainage of wealth财富的外流

drainage system排水系统，渠道系统；水系；引流装置

drainage area排水面积

gas drainage排瓦斯设备，瓦斯抽放

water drainage排水

drainage basin（美）[地]（河流的）流域；流域盆地

acid mine drainage酸性矿水排水；排泄酸性矿水

drainage works排水工程；渠务工程；排水工作

drainage pipe排污管；放泄管

drainage pipeline排水管道

drainage ditch n. 排水沟

drainage hole排泄孔；疏水孔

drainage network河网；排水网

drainage pump排水泵；排泄泵

surface drainage路面排水，地表水系

drainage channel排水沟，下水道

drainage rate滤水速度，排水速度；排水比率

drainage tube引流管；排水管

gravity drainage重力排水；重力泄油

drainage layer排水层

drainage outlet排水出口

1. Bad drainage caused the land to be flooded.
   排水不利容易使土地淹水。
2. Make holes through the base to allow for drainage.
   在地基中开洞，以便排水。
3. The drainage system has been aged.
   排水系统已经老化了。
4. The town's drainage is very efficient.
   这城市的排水系统很好。
5. He came to look at the drainage.
   他是来检查排水设备的。
6. 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。
7. 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。