We know it's going around in a circle because if I find the length of this vector, which is the x-square part, plus the y-square part, I just get r square at all times, because sine square plus cosine square is one.

我们之所以知道它做圆周运动,是因为我求出了这个矢量的模长,也就是 x 的平方加上 y 的平方,我就得到了它在任意时刻的模长平方,因为正弦平方加余弦平方始终等于1

耶鲁公开课 - 基础物理课程节选

I can check it, so if this was part of some other computation, I want to know, did it find a perfect square or not?

我可以检验它,因此如果这是其它计算的一部分我想知道，它能否找到一个完全平方根呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

It seems like it's not a news flash that religion is playing an extremely important part in our public square conversations, in our political life, in how we are making decisions on questions of poverty.

这似乎并非一条简讯,宗教发挥着极其重要的作用,在我们在公共场所的谈话中，在我们的政治生活中，在我们如何针对贫困问题做出决策。

普林斯顿公开课 - 人性课程节选

When we look at this angular part, we see that it's always the square root of 1 over 4 pi, it doesn't matter what the angle is, it's not dependent on the angle.

当我们看这角向部分，可以看到它总是等于１除以４pai开根号，这和是什么角度没有关系，它和角度无关。

麻省理工公开课 - 化学原理课程节选

Look, part of the reason I'm flaming at you is, something like square root, it seems dumb to write specs on it. Everybody knows what this is going to do. But you want to get into that discipline of good hygiene, good style.

也是非常重要的，我在这里说的,一些理由就是像平方根,为它写规范听上去很傻,每个人都知道它是干什么的。

麻省理工公开课 - 计算机科学及编程导论课程节选

I'm using it as an abstraction, saying I'm going to have square root from somewhere, maybe I'll build it myself, maybe somebody gives it to me a s part of a library, so I'm burying the details inside of it.

我把这个方法作为一个抽象来引用，意味着我将会从另外一个,地方去求一个数的平方根，可能我会自己写这个方法,也可能我会从别人写的lib中去引用,因此我将实现的细节放到了其他地方。

麻省理工公开课 - 计算机科学及编程导论课程节选