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So what they do is, they're describing how these thermodynamic properties change, in terms of only state functions and state variables.
他们的作用是描述,随着状态函数和状态变量的变化，系统的热力性质如何变化。
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I only had one year left of university, it was too late to, to change from... to a too different subject,
我还有一年就要毕业，所以已经来不及换专业了，
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PROFESSOR BAWENDI: So the question was, for an isothermal expansion, delta u does not change, therefore, The answer is that's true only for an ideal gas.
你的问题是，在等温过程中，内能是否，这只对理想气体成立。
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And I have purposely made the arrow shorter to indicate that it has been slowed because we are going to argue its mass didn't change, so the only way to change its energy is to change its velocity.
我已经故意将这个箭头弄短,用来象征它变慢了,因为我们将证明它的质量没有变，只有它的能量改变了,也就是它的速度变了。
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A good, hygienic way of doing this is, not only do I not go in and change things except through a pre-defined method, I shouldn't read it other Cartesian than through a pre-defined method.
做这个的方式是，我不仅仅要通过提前定义好的方法,来改变数值,我还应该通过提前定义好的方法，来读这个值,我应该用。
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Not only they have failed in bringing about positive change, they actually brought about negative change.
不仅没有实现正面的改变，实际上是带去了负面的改变。
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The only big change came in 1960 when they consolidated the ones around Paris, because of the growth of the Paris region, as you can see there.
仅在1960年由于巴黎区的发展,发生了一次改变,他们将巴黎周边的省进行合并,在这里可以看到
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And so you know that if only you were to read these things in the envelope, you would change your mind and no longer want to go out with her.
所以你知道,只要你看了信封里的内容，你会改变主意,不再想和她约会。
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So that's the only change we need to make there and watch what happens when we actually run this.
那就是我们需要改变的,并且当我们运行它，会发生什么事情。
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If one chord holds twice as long or only half as long, then we have an irregular harmonic change--irregular rate of harmonic change.
如果某一个和弦持续的时间是其他和弦的两倍或者只有一半，这就是不规则的和声改变。
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And, if you'd like to change, you can do so only with the permission of the administrator.
如果你们想要更改时间，只能在课程管理主任允许的情况下,这样做。
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If you wish to change sections, you may do so only with permission of the subject administrators because it's very important that those sections be kept at a small population.
如果你们想要改时间，你只能在课程管理主任允许,的情况下这样做,因为让课程的人数保持在比较少的水平,是很重要的。
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PROFESSOR 2: And not only shouldn't you change it, you shouldn't even read it.
教授2：你不但改不了它，连读也读不了。
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And so, in fact, the version that I commented out which is also in your handout and I'm now going to uncomment, let's get that one out, get rid of this one-- notice the only change.
所以事实上，我之前注释掉的版本,你们的讲义上也有，我打算把注释去掉,我们把他拿出来，把这个丢到一旁，注意下唯一的改变。
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It only cares what temperature is. If temperature is constant, there's no change in energy.
如果温度是常数,能量就没有变化，对理想气体。
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