Whatever the number two is, it's something that our mind can grasp but isn't actually in the physical world.

不管数字2是什么,它是心灵可以掌握的东西,而在物质世界中却不存在

耶鲁公开课 - 死亡课程节选

It's not as though the number two is something that you see or hear or taste or could bump into.

数字2不是,你能看到或听到或尝到或遇到的东西

耶鲁公开课 - 死亡课程节选

In this case, it's cutting up from the bottom end, which makes sense because the thing I'm looking for is always bigger than the midpoint and then, I don't know, let's pick something in between. Somebody want-- ah, I keep doing that-- somebody like to give me a number?

排除元素，这是讲得通的，因为我总是找比中点大的元素,那让我们挑一个同,中点之间的元素吧,我再来试试，谁给我个数字吧,我知道你们想给我些其他东西？

麻省理工公开课 - 计算机科学及编程导论课程节选

In contrast, on the whole other side, you've got 3 things that are invisible, like the number 3.

相反地，另一方面,有些不可见的东西，例如数字。

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We are able to talk about the fact that two plus one equals three, but it's not as though we ever come across numbers-- number three itself--anywhere in the empirical world.

我们可与去探讨,二加一等于三的这个事实,但是我们不可能有一天真的碰到数字,在现实世界中碰到个叫"数字三"的东西

耶鲁公开课 - 死亡课程节选

So we've looked at how to solve square root we've, looked at two problems, I've tried to instill in you this sense of paranoia which is so valuable, and now we're going to pull back Python and return to something much simpler than numbers, and that's Python. All right?

我们已经研究了如何去求平方根,研究了两种方法,我一直在尝试着给你们逐渐灌输,要偏执的理念，这样的理念非常有价值，现在我们回过头来去学习一些,比数字更简单的东西，也就是,对不对？数学问题很难？

麻省理工公开课 - 计算机科学及编程导论课程节选

Basic idea, before I even look at the code, is pretty simple. If I've got a list that is sorted, in let's call it, just in increasing order, and I haven't said what's in the list, could be numbers, could be other things, for now, we're going to just assume they're integers.

我们可以说基本的思想是很简单的,如果我有一个排好序的数组，让我们认为这个数组是递增的吧，我并没说数组里元素是什么，可能是数字，也可能是其他的东西，现在我们假设是integer类型的数字吧，最简单的方式就是这么做了：

麻省理工公开课 - 计算机科学及编程导论课程节选