watercourse

名词 watercourse:

1. natural or artificial channel through which water flows
2. a natural body of running water flowing on or under the earth
   同义词：stream
3. a conduit through which water flows
   同义词：waterway

wa.ter.course

n.（名词）
A natural or artificial channel through which water flows.
水道：自然或人工的水流通道
A stream or river.
溪或河