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So let's take a look down here at what I'm doing and notice here that this is perhaps more compelling; right?
让我们往下看一下我在做什么,请注意这里这个可能是更引人入胜的，对不？
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I'm just spending time with friends, and I come here sometimes just to have lunch.
我就和朋友们打发下时间，有时候来这里就仅仅为了吃午餐。
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Right, so there's that special sentinel value that's back slash zero, which we'll start to see more explicitly now.
对的，这里有一个特殊的值“反斜杠0“,我们等下会更了解它。
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And in fact if I go off and run this, OK, what I was printing here was s 1 dot length, and that's -- What is it doing?
他们就是一些有结构的实例，实际上如果我去运行下这个，好，我这里输入的？
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Also to point out, a lot of times you'll see electron volts instead of joules, this is the conversion factor here just so you all have it in your notes.
同样也要指出，很多情况下你会看到,电子伏特而不是焦耳，这里是换算因子,你们在讲义上都能找到。
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So we know that in each case the heat is going to be the opposite of the work, but the work isn't the same in these two different ways of getting from here to here, right. So let's just see it explicitly. Here's our qA.
所以我们知道在每种情形下功,与热量相差一个负号,但从这里到这里，在这两条路径,中的功是不同的，对吧？,那么让我们明确地看一下。
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And so, if we go and we draw this again, if this is the carbon here, hydrogen, hydrogen, hydrogen, hydrogen like this, then this is going to be a little bit plus.
如果我们继续，我们将再次画下这个，如果这儿是碳，氢，氢，氢，氢，就像这样，这里有些正电荷。
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But then there is this very explicit discussion of her Catholicism, a little further down: My background and my inclinations are both Catholic, and I think this is very apparent in the book.
然后这里有一段非常明确的,关于她的天主教义的讨论，在往下看一点：,“天主教是我的背景和取向，我想这在书中有很明显的体现。
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The similes are continually working to unleash -and they're really quite unruly in this respect -to unleash the moral and the theological confusion that so much of the rest of the poem seems really quite eager to pin down and to fix.
这里的比喻不断的想要解脱束缚,-它们从这个方面来看也的确不受什么束缚,-解脱道德上和理论上的混乱无序,这首诗的剩余部分都显得急切于,下定论进行弥补。
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I almost said 'next week' but we rarely plan that close to the event.
我这里说“下星期”,但其实很少在那么短的时间内才计划。
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And here's the crucial point for that person lecturing to you on Tuesday to be the very same person as the person lecturing to you today on Thursday.
这里有个重要问题,那个下星期二给你们上课的人,一定要是这个星期四,给你们上课的人。
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So let's listen to Mozart's depiction of hell and heaven here.
那么,让我们来听下莫扎特,在这里对地狱和天堂的描述吧
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This is the best response of Player 1 to the best response of Player 2, to the best response of Player 1 to Player 2 producing half monopoly output and there are lots of brackets here.
它表示参与人1对于参与人2的最佳对策,是参与人2生产垄断产量一半的情况下的,这里有一大堆的括号
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after grown up in that weather, I was ready to move on, so.
因为在那种天气下生活过，所以我决定搬到这里来住。
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So you may take this course ultimately via pass-fail or letter grade and I am more than happy to chat with you about the implications and to sign any paper work such as the stack here that you might need.
你可能希望这门课采用及格-不及格分制或者分数制,我很乐意跟你聊下,两个打分制各自的含义,也可以帮你在这里签到。
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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。
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And the last piece I want you to see here, and then I'll let you go is, notice now how that encapsulation, that binding things together has really helped me.
我想要的那么干净，最后一点要给大家讲的是，也就是下课前讲的一点，就是请注意这里是怎么封装的,也就是把东西绑定在一起。
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So when I do the analysis, I want to think about what am I doing here, am I capturing all the pieces of it? Here, the two variables that matter are what's the length of the list, and how many times I'm going to search it?
这里，要关注的,两个变量是列表,的长度以及我要搜索的次数,这种情况下，这个算法赢了？
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But a point I'm trying to make is, it sounds like anymore computers have gotten so blazingly fast, why should you worry about it?
但是这里我要讲的一点是，在任何一台计算机,都能这么快的运算的情况下，我们还管效率这个问题干嘛呢？
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And so I'm going to go back to this idea of a class, and let's build the first of these, and that is shown right here on this piece of your handout.
你把半径加到一起,你不会把角度加到一起，你需要再笛卡尔坐标下，进行这个操作,那么我这里在讲的就是。
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So one of the things I want you to notice here is that testing and debugging are not the same thing. When we test, we compare an input output pair to a specification.
这里我想大家注意的一件事,就是测试和调试是不同的两件事情,我们测试的时候，我们把输入输出,跟程序的规格说明书对比下。
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Well I have to go to the zero-th element, and say OK, gee, to get to the next element, I've got to jump this here. And to get to the next element, I've got to jump to here, and to get to the next element, I've got to jump to here, until I get there.
再回到第0个元素，好的，然后找下一个元素，跳转到这里，然后再下一个元素，跳到了这里,然后再下一个元素,直到我找到那个元素,这样，我有方法来保存变长的元素。
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All right. Let's listen a little bit more to the Musorgsky and then we're going to go on, just a bit more to the next excerpt, and here's my question for you.
好,咱们来继续听听穆索尔斯基,然后我们继续下去,到下一个选段,这里就有个问题了
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That's where we'll start next time.
我们下节课就从这里开始
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So, summarizing better, assert is something you put in to say to the user, make sure you're giving me input of this type, but I'm going to guarantee you the rest of the code works correctly. Exceptions and exception handlers are saying, here are the odd cases that I might see and here's what I'd like to do in those cases in order to try and be able to deal with them.
所以更好的总结下,断言就是你放在那里告诉用户,保证你输入的是这种类型的,但我能保证剩下的代码运行正确,异常和异常处理做的事,这里有些我能预期的异常情况,并且这里有些情况,我能尝试处理。
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r And what that is the probability of finding an electron in some shell where we define the thickness as d r, some distance, r, from the nucleus.
在某个位置为,厚度为dr的壳层内,找到原子,的概率，我们来考虑下我们这里所说的。
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z So the main idea here is z effective is not z, so don't try to plug one in for the other, they're absolutely different quantities in any case when we're not talking about a 1 electron atom.
所以这里主要的观点是有效的z不同于，所以不要尝试将一个插入到另一个，当我们不在讨论1个电子的原子时,它们在任何情况下是绝对不同的量子数。
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I spotted an error here, I could have spotted it by running it on different test sets, and using prints things, another way of doing it, but this idea of at least simulating it on simple examples lets you check a couple of important questions.
操作么？我在这里发现了一个错误,我也可以通过运行不同的测试集，或者运用print声明来发现这个错误，但是至少应该用简单的例子来手工模拟下,代码的思想可以让你,对一些很重要的问题进行检验。
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The next phrase, B-- is very similar, but here it takes the deviation-- And gets it back-- gets us back to the tonic.
下一乐句,B,与之前非常相似,但从这里偏离,又回来,回到主音
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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？
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