我的意思是，上一次我们讨论过了，这个梯度是垂直于等高线，并且是指向方程增长的方向的。

I mean we'd seen in last time, but the gradient is perpendicular to the level and points towards higher values of a function.

youdao

开发人员拥有一个单个私有的工作区，最初指向活动开发线最新版本的集合。

Developers typically have a single private workspace initially pointing at the collective set of latest versions of the Active Development Line.

youdao

倾斜牙刷是的刷毛指向龈线。

Tilt the brush so the bristles are pointing at your gum line.

youdao

That's just the those-- let me use my pointer that's just these two lines here. I checked the value, and in one case, I'm changing the last to be mid minus 1, which is the case I'm in here and I just call again. All right?

来看看ppt，这里有两条线,我检查了值，在一种情况下,我把last指向了中点减一,就是这种情况,我们再来调用一下怎么样？

麻省理工公开课 - 计算机科学及编程导论课程节选