watercourse的复数形式怎么拼写？

watercourse的音标：watercourse的英式发音音标为：['wɔ:təkɔ:s]watercourse的美式发音音标为：['wɔtərkɔrs]...

This species of fish successfully transferred to that river through a watercourse.这种鱼成功地通过一条水道到了那条河流。The waste repository was usually the nearest watercourse.废物容纳地点一般是离城市最近的水域.A watercourse that feeds water into a mill, ...

n.水道，河道...