upstream
/ˌʌpˈstriːm/Something that is moving upstream is moving towards the source of a river against the current, from a point further down the river. 向上游
adverb [地点副词] 向（在）上游；逆流地
Salmon manage to swim upstream to lay their eggs. 三文鱼设法游到上游产卵。
adjective [原级] 向（在）上游的；逆流而上的
We'll go to the upstream side of that big rock. 我们将去那块大岩石的上游一侧。
- upstream 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 56 Our neighbour,the river
- 网友用 “Upstream” 造句精选
- The falls upstream are full of salmon. 上游瀑布一带盛产鲑鱼。
- Something that is upstream is towards the source of a river. 上游是指河流的源头。
- the river police, whose headquarters are just upstream of the Isle St Louis 总部就设在圣路易斯岛上游的水警