stream

There's a bubbling stream that flows through their property.

一条汩汩的小溪流过他家的土地。

I'm in the A stream for maths, and the B stream for English.

我数学在 A 组，英语在 B 组。

She stopped rowing and let the boat float with the stream.

她不再划，任由小船顺流漂荡。