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But I'm sure you can easily see how these styrofoam balls could, in fact, be a mono layer of gold nuclei.
这个实验怎么工作的,我们先来做些计算，但我相信你们都已经。
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It's 33, 32, it's only 32 times and you can check that math at home but here lies the power of algorithmic thinking, of computational thinking as they say.
你需要33，32，对，32次,你也可以在家里自己计算，但数学算法的力量是无穷的，这就是科学家们所谓的计算机思维。
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But the beauty in this calculation is it shows that this concept of electron sharing in an unequal manner is sound and it gets you into the right ballpark.
但在这个计算过程中,真正漂亮的是对电子,非平均共价的考虑很完全,从而指引我们向一个正确的方向思考。
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As you know, the correct answer is 9.8, but we don't want to use the calculator now so we'll call it -10.
当然大家都知道,事实上应为9.8,但我们目前不想用计算器,所以我们就取-10
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It's the same computation. But this is a nice way of writing it, often called defensive programming.
这跟原来的计算过程没什么不同,但这是写代码的更优秀的一种方式。
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Your computer works on wires and electricity but your brain uses tissue and tissue is extremely slow.
你的计算机依靠电线与电流而得以运行,但你的大脑应用的则是组织,而组织的反应则是相当缓慢的
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If we want to know the total heat added to the system, we can measure it, which is the straightforward thing, but sometimes you want to calculate in advance, or sometimes you want to calculate it on an exam.
如果想知道给系统的总热量，我们可以测量，这是很直接的事情，但有时候我们想事先计算它，或者需要在考试中计算。
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Although a little bit of Computer Science.
但我对计算机有所涉猎。
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Now as I say, I made this calculation some years ago It doesn't really matter how inaccurate it's going to be As we'll see it's very rough but it makes the point ? How many people are there?
现在就像我说的，我很多年前做了这个计算,到底它有多不精确其实无所谓,我们会看到,这个计算很粗糙,但却给出了一个说明,有多少人？
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You figure that most of those boxes are being eaten by somebody or another, there's some waste that you might calculate in, but there--error gets introduced there trying to estimate that, so you get a number on that.
你的计算中大部分食品,都被人们吃了,浪费的那些也要计算进来,但其中的误差,也要估算出来,最后得出一个数字
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The price of a share is the price of the ownership of that earnings' stream If I buy a share I'm in with everyone else who owns the company and I have a claim on the earnings' stream, but the earnings' stream is a year-by-year thing.
每股价格是指,收入所有权的价格,如果我和其他股东一样买了一份股票,那么我就对收益有要求权,但收益是逐年计算的
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So I differentiated this object, this is my first derivative and I set it equal to 0 Now in a second I'm going to work with that, but I want to make sure i'm going to find a maximum and not a minimum, so how do I make sure I'm finding a maximum and not a minimum?
这样我就对它求出导数了,这是一阶导数,令它等于0,一会我们就要计算了,但我先确定一下是最大值还是最小值,我怎么确定是最大值还是最小值呢
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It's just not possible to solve some of these problems by hand and this isn't even a domain that's necessarily into the world of CS but speaks to you the applicability of it all.
手工处理这些问题似乎有些不大可能,但这还不是,计算机科学要解决的主要问题,我们的目的只是为了告诉你它的用途。
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Okay, so while not equal to, so bang equals, exclamation point equals is computer science syntax for saying not equal to, 0 while not equal to 2 which it is not, it is equal to 0.
好的，尽管不等于不是相等的反写,但惊叹号在计算机科学的语法是不等于的意思，尽管不等于2，但它是等于。
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And that latter statement sounds funny, you don't think of computations having limits, but they do.
这个说法听起来挺逗，你们不会认为计算有局限性，但事实上他们有。
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He goes back and redoes the calculation, only in this case he says what I am going to do is I am going to redo the calculation for helium, but I am going to consider not just the mass of the electron but the reduced mass of the system.
他回去重新做了计算，仅在这种情况下他才会说说我将要,为氦重做计算，但我认为,不只是电子的质量,还有系统质量的减少量。
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The point I'm trying to make is, fixed-program computers is where we started, but it doesn't really get us to where we'd like to be.
我要指出的一点是，我们从固定程序计算机开始说起，但它并不能让我们到达我们想去的地方。
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Computers smart though they may be and intimidating though they may be, they cannot yet think for themselves.
计算机可能是智能的,也可能是可怕的，但计算机还不具备自我思考的能力。
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But, remember, this is a very rough estimate.
但，记住，这只是一些粗糙的计算估计。
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