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Just sixteen percent thought it was OK to take that phone call.
VOA: special.2009.03.12
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OK, now what I want to do is just describe a little bit of how do you measure all this stuff, right?
好，现在我要做的就是,介绍一下怎样来测量这些东西？
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You just want to get the overall idea of what is being said so that you're able to respond. Ok?
你只是想了解人们所说的话的大意，那样你就可以做出回答了，对吧？
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OK. Now. This is just sort of bringing us back up to speed and adding a few more details in.
好，现在，我们刚刚回头,过去看了一些,细节问题。
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OK. We're going to just try this one more time just so you can see it.
好的，我们将要再尝试一次,这样你们就可以看到它。
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OK, so here is just an engine like what we've already seen, and I'm going to specify that this is a Carnot engine which is to say all the results that we just derived hold for this case.
这一个热机,跟我们以前见过的差不多，我们把它确定为,卡诺热机,所以我们之前得到的结果都对它适用。
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The disease model,the optimum level is the zero: let's just be Ok; let's just not hurt.
对疾病模型而言，最优水平是零：,我们都平平安安，别受伤就好了。
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Just say, OK we have eight real intelligent people here.
换言之，怎么样安排这八个聪明人。
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I just wish we could do it together, but that's ok.
我就是希望我们俩能一起玩，不过也没什么问题啦。
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In the example I just wrote here, this is pretty trivial, right. OK, I'm trying to input floats.
在我写的这个例子中,这是很微不足道的。
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OK, I want to spend the last few minutes just showing you a couple of other things that we can do in here.
好，我想把最后一点时间,用来给大家看看我们能做的,一些其他的东西。
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Well let's see. My fall back is, I could just do linear search, walk down the list one at a time, just comparing those things. OK. So that's sort of my base. But what if I wanted, you know, how do I want to get to that sorted list? All right?
我只能做线性搜索了,一次遍历一遍列表，一个一个比较，但如果我想要,那怎样得到有序的列表呢？,现在的一个问题是，我们排序之前？
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Let's just go through these laws, OK, very quickly.
让我们快速地，过一遍这些定律。
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Right now, this is just a text file. OK.
好，这就是一个文本文件，好。
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Now we can think about the fourth period, and the fourth period is where we start to run into some exceptions, so this is where things get a teeny bit more complicated, but you just need to remember the exceptions and then you should be OK, no matter what you're asked to write.
现在我们可以考虑第四周期，而且在第四周期,我们会遇上一些特例，所以事情有,一点复杂，但是你只需要记住,这些特例然后就没有问题了，无论你被要求写什么。
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It's all OK. Just breath.
都没关系，呼吸。
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Sorry? OK. You're doing the whole thing for me What's the complexity just of this inner loop m How many times do I go through that loop?
就这一块代码的,我执行了多少次这个循环？,次对不对？，here？，Just，this，piece。,我一会儿就会去得到你的答案的？
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OK, so far though, I've just shown you what happens inside a peace a code. It raises an exception. It goes to that accept clause. We don't have to use it just inside of one place.
好了，我已经给你们看了,代码内部发生了什么,它报了一个异常，然后就到了处理的片段,我们不该就在一个地方用它。
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OK, let's just turn the crank on the maths.
好，让我们开始数学推导。
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Ok, watch me: Just like this, Ok?
看着我，就像这样？
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OK, I can certainly print out strings, but I can actually add strings together, and just as you saw, I can multiply strings, you can kind of guess what this is going to do.
当然我可以显示字符串，但是其实我还可以令字符串相加，如你所见到的，我可以令字符串相乘，你们可以想想答案是什么。
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OK. Don't sweat the details, I'm just expanding it out.
我只是把它展开了而已，我想大家注意到的是。
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OK. The other thing I want to say here, is that this style of program we just wrote is actually a very common one. And we're going to give it a nice little name, often referred to as exhaustive enumeration.
好，另外一件我想说的事情是，刚才我们写的代码的风格,是非常普通的,我们会给这个风格一个名字，通常是被称为详尽的列举。
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And keep going, until the square of one of those integers is greater than or equal to - sorry, just greater than x. OK, why am I doing that? When I get greater than x, I've gone past the place where I want to be.
如果还是比x小的话，跳到3，这么继续下去,直到一个整数的平方大于或者等于,对不起，是大于x，好,为什么我要这么做呢？,让我得到的整数的平方和。
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Ok, just fine, 2 it's no big deal.
我们定义这个点的半径为，然后角度pi是。
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OK, you've actually seen exceptions a lot, you just didn't know that's what they were, because exceptions show up everywhere in Python. Let me give you a couple of examples.
好的，你们实际以及看过很多异常了，你就是不知道这些是什么，因为异常在Python中随处可见,我给你举些例子。
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And if I were to use that again, I'd just put it on your handout, I could go back and rewrite that thing that I had previously for finding the square roots of the perfect squares, just using the FOR loop. OK. What I want to do, though, is go on to-- or, sorry, go back to - my divisor example.
它可以是任意的集合,如果我又要去用这个方法的话,我会把它放在你们的课堂手册上的,我可以回过头去用FOR循环，重新写我们那个求平方数的程序，我想要做的是，是继续-哦抱歉,回到-我的除数那个例子。
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OK. So it's just adding 1 to x.
好了这就是给x加1。
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OK, so how can I code this up? Well, you might think, let's just jump in and write some code, I don't want to quite do that though, because I want to show you another tool that's valuable for thinking about how to structure the code, and that is a something called a flow chart. Now.
好，那么我怎么把这个以代码实现呢，你可能会想，让我们进去直接写代码把,但是我不想这么做，因为我想教给大家另外一项很有价值的,用来组织代码的工具，叫做流程图,现在，像Guttag教授,和我这么大岁数的人。
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