rivulet

In one of the ravines I came upon a hollow full of spring water which overflowed as a little rivulet, where sported tiny fish battling their way up the current.

在一个沟壑中，我偶然发现了一块洼地，充满了像小河般涌流的泉水，小鱼在其中嬉戏，竞相着逆流而上。