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And typically, we'll be treating at least some cases where we're dealing with ideal gases in which case we can easily get delta u.
那么我们也可以定出功，对吧？,典型地，我们至少会处理,一些理想气体的情况。
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OK, this is only true for an ideal gas, and we went through that mathematically where the, with a chain rule.
这一关系只对理想气体成立，上节课我们,用链式法则推导出了这一关系。
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And I think it's impossible not to see that when Milton substitutes the virtue charity with the far more circumscribed ideal of chastity.
而我认为当弥尔顿把更加局限的贞操去代替局限的仁爱时,这不可能读不出来,虽然贞洁更加局限。
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And this is something to contrast with the early Yeats and its high idealism, and its drive to exist in an abstract and ideal world.
这可与早期他诗歌的理想主义,致力表现，抽象理想世界作对比。
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The first five books that deal with and culminate in the best city, Kallipolis Plato's ideal city, what he calls Kallipolis, the just city, the beautiful city, ruled by philosopher-kings.
前五部讲述,书中高潮的所在，柏拉图的理想城市，他称之为，正义之城，美丽之城，由哲学家国王所统治；
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Let's try it with a different equation of state, that isn't quite as simple as the ideal gas case.
考虑一个不同的状态方程，这状态方程不像理想气体状态方程那么简单。
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This quantity is exactly zero for an ideal gas and we'll discover why eventually it has to do with what we mean by an ideal gas it turns out.
对理想气体它是零,这点我们接下来会知道是,为什么，这与为什么我们叫它理想气体有关。
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In the works that Milton is going to be publishing now with greater and greater frequency, it's this Spenserian ideal of marriage that will be the new and, believe me, the endlessly complex Miltonic subject.
在弥尔顿准备出版的作品中,越来越常出现的，是斯宾塞式的婚姻理想，那将是崭新的，相信我，也是无尽而复杂的弥尔顿风格的题材。
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That is, ideal gas. And see how it works with that.
然后看我们上面的步骤如何给出有用的结果。
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Therefore, from experiments, u is only a function of temperature for an ideal gas, H and therefore from these experiments, 0 we come out with delta H dH/dp is equal to zero.
因此，从实验可以得出,对于理想气体u只是温度的态函数，因此从这些实验中我们得到Δ,偏H偏p等于。
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This is only true for an ideal gas. Since it's true for an ideal gas, then we can go ahead and replace this with Cv, and then we have Cp=Cv+R Cp with Cv plus R, which is what we were after.
常犯的一个错误，这只对理想气体成立,因为对理想气体成立,所以我们可以继续，用Cv代替,这项，最后得到。
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