Why don't we give Philip both the matching pair and give you each a pair of socks since he didn't get to wear this one, they are brand new, in fact, and a big round of applause for what I'm sure is a little difficult.

我们为什么不给飞利浦一双配对的袜子,给你们每人一双袜子,他还没穿这双袜子，所以这双还算是全新的，再次以热烈的掌声对他们表示感谢,这样的模仿还是有一些难度的。

哈佛公开课 - 计算机科学课程节选

In Philip's case, we ask the question, does he have zero or none zero socks on his feet?

在飞利浦这个例子中，我们就需要判断，他的脚上有没有袜子？

哈佛公开课 - 计算机科学课程节选

So here is an example of socks on feet being 0 the number of socks on Philip's feet which is in fact 0.

因此这里有个袜子在脚上的例子,在飞利浦脚上的袜子数量实际上是。

哈佛公开课 - 计算机科学课程节选

If there is no matching socks then what's gonna happen with Philip here?

如果这里没有匹配的袜子,那么飞利浦会怎么样呢？

哈佛公开课 - 计算机科学课程节选

And we saw this with Philip's example.

我们刚才已经看了飞利浦的例子。

哈佛公开课 - 计算机科学课程节选

And so when you start to poke around the puzzle pieces, you see that it can say things, we'll see movement in just a moment and sound and so forth, but at the end of the day, this is just like the program we used a moment ago for the sock exercise where we just hold Philip a step after step after step, do this, do this, do that, and yet, here too, we already see an opportunity for that thing we called the loop.

如果你认真看下这些拼图，你会发现它都是一些移动，并发出声音的功能块,就像我刚才的,练习程序一样,我们让飞利浦做这个动作，做那个动作，跟这里的情况一样，我们已经看到了称为循环的东西。

哈佛公开课 - 计算机科学课程节选