那只鸟鼓翼向河的上游飞去。

The bird flapped (its way) up the stream.

《新英汉大辞典》

他们租了条小船，划向河的下游。

They hired a boat and went for a row down the river.

youdao

谁会希望在建造一座跨河大桥进行到一半的时候，客户却提出将其向河的下游再移动一些呢？

Who would want to have built a bridge half-way across a river and have the customer decide that it would be better situated a little further downstream?

youdao

who went and found this river that flows east to west.

他们找到了这条由东向西流的河。

神话有趣的课 - SpeakingMax英语口语达人