1. Face discharge watercourse design is adopted in order to reduce core erosion by mud for increased rate of core recovery. 采用面泻式水道设计，减小泥浆对岩芯侵蚀，取芯收获率高；
2. It is an enormous risk for coal production that the water flows into the mine through underground watercourse during mining. 采矿时往往会有各种水体通过地下导水通道流入矿井，从而危害矿井安全。
3. Organic pollution results when large quantities of organic matter are discharged into a watercourse to be broken down by microorganisms, which utilize oxygen to the detriment of lie stream biota. 有机污染是这样产生的，如果大量有机物被排入河流，通过微生物的分解氧化从而损坏了河水里的生物群。
英英解释
n.
1. natural or artificial channel through which water flows
2. a natural body of running water flowing on or under the earth
3. a conduit through which water flows
