河流上方用英文怎么说

"Upstream" 表示河流的上方。这个词源于古英语中的 "strem"，意思是 "stream" 或 "river"。

例句：

The fish swim upstream to lay their eggs. (鱼儿顺着河流往上游游去产卵。)
The water at the upstream end of the river is usually fresher. (河流上游的水通常更新鲜。)
The company built a dam upstream to generate electricity. (公司在河流上游建了一座大坝来发电。)