我们将去那块大岩石的上游一侧。

We'll go to the upstream side of that big rock.

《柯林斯英汉双解大词典》

河的上游是这样，附近没有别的房子。

Away up the river so, and not another house about.

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这些水坝阻断了6种鲑鱼的上游产卵地，而这条河曾是世界上鲑鱼产量最高的河流之一。

These dams blocked access to upstream spawning beds for six species of salmon on what once was one of the most productive salmon rivers in the world.

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Odds are if you're an upperclassman, you've had that experience where it's 12 AM, 1 AM, 2 AM, and you're really starting to stress over the incompletion of some problems that for some course, well frankly what this mechanism allows you to do if you're already 90 percent of the way there, you can call it a night and you can put it down and you could feel good nonetheless about where you got to.

对于上游的同学可能觉得无趣，因为他已经具备了这些经验，这时应该开始关注某些课程中,问题的不完整的部分，如果你已经学会了,里面90%的知识，你可以停工,或者把这门课扔到一边。

哈佛公开课 - 计算机科学课程节选