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So the first step to doing that is I want to just generalize our results so far for a Carnot cycle.
第一步,首先来推广一下,卡诺循环的结果。
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See my friends, go drink, go for a drink, go for a walk, get to the countryside, cycle, I like cycling, I do that.
看朋友，去酒吧，去喝酒，散步，去乡下，骑自行车，我喜欢骑自行车，我就做这些事。
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So we're going to go through a thermodynamic cycle, and here's what I want to calculate when we do this.
那么我们要推导,一个热力学循环,这是这个过程中我要计算的东西。
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Or, you cycle through all the great art museums in the world and you say, "Yeah, I've seen these Picassos.
或者你游遍各地艺术馆,你会说“是的，我见过毕加索风格的画。
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But if it is not, it's going to print out a message here saying, you screwed up, somewhat politely, and it's going to go back around. So it'll just cycle until I get something of the right type.
但是输入不是浮点数的话,我这里就会显示一个消息说，你搞砸了，该稍微有点礼貌吧？,然后我们继续执行循环,一直到得到正确类型的输入。
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This is called the Born-Haber Cycle, what I am showing you right now.
这个是玻恩-哈伯循环，也就是我正在讲的。
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That's when I have difficulty getting out of this downward, vicious cycle.
那时我将很难脱离这种下行，恶性的循环。
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Before I move on, I'm just going to put on the board another cycle, and I'm going to urge you to work through that on your own.
在我继续之前，我要在黑板上,画另一个循环，我希望你们,能自己去推导它，它已经被详尽地推导过了。
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Well, so now I can complete the cycle.
好，现在我可以让这个循环闭合。
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Now, I wanted to go to through this just to go through one cycle quickly because we're going to be doing these all the time, and the importance of the fact that the path doesn't matter, and you can always connect things together in a way, whatever you want.
我使用这种,利用热力学循环的推导方法的原因在于,今后我们，将经常使用类似的方法,大家要记住路径是无关紧要的，可以随意选取一条路径,来连接两个态。
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Now what I want to do is put up a specific example of the cycle that can be undertaken inside here in an engine, and we can just calculate from what you've already seen of thermodynamics.
现在我想做的是,举一个例子,来具体说明热机内部的循环过程，同时我们可以利用热力学定律进行计算,看看热力学参量发生了什么变化。
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