So p dot Cartesian is a kind of accessor, it's getting access to the data.

这就是为什么，我想要使用访问器的原因。

麻省理工公开课 - 计算机科学及编程导论课程节选

Can you describe the public transportation that you use and why you like it?

你能描述下你使用的公共交通工具吗？还有你为什么喜欢它呢？

地铁的好处 - SpeakingMax英语口语达人

And that's why, I ended up using a multiplicative factor, rather than an additive factor.

这也是为什么，我最后使用一个倍增因子，而不是用一个加法因子。

麻省理工公开课 - 计算机科学及编程导论课程节选

You see how I completely bypassed The Wall Street Journal and I went to Treasury Direct?

明白我为什么要抛弃《华尔街日报》,而直接使用"国库指南"了吗

耶鲁公开课 - 金融市场课程节选

I mean you have to ask yourself why did we ban thalidomide.

请回想一下,我们为什么要禁止使用沙利度胺。

普林斯顿公开课 - 人性课程节选

So, conceptually if you've ever wondered why you get access in all of your functions to global variables that's because they're not down here, they're at the very top of RAM and any function can access that RAM way up there, but for now the interesting player in the story is this thing called the heap.

所以，如果你想知道为什么全局变量能在,所有的函数中使用,那是因为它们不在这下面，而是在内存的顶端,那样任意函数都可以在内存中使用它们，现在，这里面一个有用的角色是,叫做堆的东西。

哈佛公开课 - 计算机科学课程节选

Now, that's a very important point, because why in the world would you give a shield of the kind I am describing, for a man to defend himself, if you imagine him standing by himself anywhere, if you imagine him any distance from the rest of the guys fighting alongside of him.

这点非常关键,那就是到底为什么要将,这样一种盾牌,给士兵们使用,想象一下这个场景,这个士兵在战场的某个角落孤军奋战,与其它友军士兵相隔甚远

耶鲁公开课 - 古希腊历史简介课程节选

Why use those confined spaces?

为什么要是使用限定的空间？

耶鲁公开课 - 1945年后的美国小说课程节选

But for now let's simply say that we have a diffraction which we know occurs only by wave-like behavior and it involves the use of x-rays. Why x-rays?

但现在让我们来简单假设一下,我们知道,只波才发生衍射,而且衍射涉及了X光的使用，为什么是X光？

麻省理工公开课 - 固态化学导论课程节选

Now why am I going through all this, maybe I should use the word pseudo-theory?

现在我为什么要这么做呢？,或许我应该使用伪多项式这个值？

麻省理工公开课 - 计算机科学及编程导论课程节选

As an aside, why are you able to use print F without writing out a prototype for it?

此外，为什么我们不用写printf的函数原型,而可以使用它呢？

哈佛公开课 - 计算机科学课程节选