headwater是什么意思音标:英 ['hedwɔ:tə(r)]美 ['hedwɔ:tə(r)]

n. [常作~s](河流)上游源头

n. the source of a river

headwater的用法和例句:

1.These chilly headwaters may be oxygenrich, but they contain few nutrients.

这些寒冷的源流或许富含氧气 但缺乏营养