It does represent the sum, in the sense that if i gave you four bucks and I gave you five bucks, I gave you effectively nine.

它表示的就是这两个矢量的和,好比是如果我给了你四美元,然后再给你五美元,我其实给了你九美元

耶鲁公开课 - 基础物理课程节选

It doesn't tell you this is my hometown and this is Japan and so forth. It gives you a lot of visual cues that you use in my personal journey to see what Japan is like on a personal level.

就在于车上没有人说话，它不直接告诉你这是,我的家乡，这是日本等等，它给你许多,视觉提示，你会通过这些提示,从个人的角度看日本。

麻省理工公开课 - 媒体、教育、市场课程节选

That's a very large number, it's all relative, so you don't necessarily know it's large without me telling you or giving you other ions to compare to, but chlorine does have a very large affinity, meaning it's really likes getting an electron and becoming a chlorine ion.

这是个非常大的数值，这种数值都是相对的，因此你不一定能知道这是非常大的,除非我告诉你或给你另外离子数值作为参考，但是氯确实有很高的电子亲和能，这意味着它非常乐意得到一个电子,而变成一个氯离子。

麻省理工公开课 - 化学原理课程节选

To gain an understanding of some of the issues involved, and the emergence of a tribal structure in the land, it's helpful to know something about the geography of Israel, which is why I have handed out for you a couple of different maps but one that gives you physical features .

为了了解其中一些事件，以及在这片土地上逐渐出现的部落形式，了解以色列的地理是很有好处的，这也就是我给你发了几份不同地图的原因,其中有一幅呈现了物理特点，在最上面。

耶鲁公开课 - 旧约导论课程节选

In fact, I would encourage you to think the way physicists do, even if you don't plan to be a physicist, because that's the easiest way to do this subject, and that is to follow the reasoning behind everything I give you.

其实,即使你们不打算以后当物理学家,我也希望你们能像物理学家一样思考,因为这是学习这门课的捷径,也就是利用我给你的条件一步一步地推导

耶鲁公开课 - 基础物理课程节选

So I just have to see, oh, here's a D, let me keep looking, D here's an A, keep looking here's a V, here's an I, here's a D and yet, and this is one tidbit we introduced a week or so ago, how do I now know if I'm just given the address of the start of the string where the end is?

我只需要看到，哦，这里是一个D，让我接着往下看，这里是A，接着这是V，这是I，这是,然而，这是我们一周以前介绍的花絮，如果你给我一个字符串开始的地址,我怎么知道它什么时候结束？

哈佛公开课 - 计算机科学课程节选