And the idea behind recursion I'm going to describe with a simple example. And then I'm going to show you how we can actually use it.
但是为了解释递归的意义,我想举个简单的例子,我将会给你们展示我们该如何使用它。
You can use it to describe or to ask questions about distance, about a length of something.
你可以用它来询问路程或者东西的长度。
It's not something that you can either explain in word or describe.
不是你可以用言语,来解释和描述的。
You can't come up with a number to describe the twenty-five standard deviation event; it's just too large a number, I think, for any of us to really comprehend.
你根本无法想出一个数字,来描述这个偏离25倍标准差的事件,对我们普通人来说,这是个难以想象的天文数字
So, it turns out that n is not the only quantum number needed to describe a wave function, however. There's two more you can see come out of it.
事实上,n不是描述一个波函数需要的,唯一的量子数,你们可以看到,还需要,两个量子数。
Okay, now let's make this first battle I'm going to describe for you to be as clear cut as we can make it, and it probably never was like that.
好的 现在,让我们打响第一场战斗,我们做得尽量简洁些,也许事实上的战斗并非是这样
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?
So, you can see, it's much easier to describe that as one term, r here, instead of using both y and z.
所以,你们可以看到,用r而不是y和z来做描述,使得它变得更为简单。
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