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And the triple point of water is 16K that temperature and pressure - there's a unique temperature and pressure where water exists in equilibrium between the liquid phase, the vapor phase, and the solid phase.
与水的三相点,我们定义它为273。,水的三相点,是一个特定的温度和压强,可以使水的液态，气态和固态三相共同达到平衡，三相点是液态。
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The piston has a cross-sectional area, a, and the force pressure is force per volume area.
我们以活塞系统为例，来说明膨胀功。
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We could begin to put a certain amount of pressure on the text and possibly, as I say, - begin to do things with it which are kind of a five-finger exercise-- -- we'll be doing a lot more of that sort of thing--but which might work.
开始时我们应该对文本抱有一定的怀疑,就像我说的，用一种五指练习法来做-,以后我们会大量涉及到这种练习。
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As it does that it changes the volume of the heart and gives the - creates the pressure that moves blood around your body, so it has that muscular system.
这使心脏的体积发生变化,产生了足以使血液流遍全身的压力,这就是心脏中有肌肉系统的原因
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Black Boy We started this course talking about Black Boy - and the way that a whole world of pressure-- pushed on the borders of that work and actually changed its very material form.
在开始这门课的时候我们先讨论了,说了这个充满政治压力的种族矛盾激化的世界-,并且已经改变了,它的实体范畴的。
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And he ended with the position that the only way to put pressure on spending was by cutting taxes I never heard him use the phrase " but he subscribed to the starve-the-beast thesis.
到最后，他倒过来了,说，要想给政府施压，来削减财政支出,减税是必由之路,他倒是没有明确说,但依我看，他用的这招叫“把帽子扔过墙去。
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I really think by being an activist and putting pressure on that board that has done nothing really--I think eventually that will happen, hopefully Maybe we'll have one or two more questions Two more questions and then we'll wrap up.
我觉得通过做一个改革者该做的,以及对现在无能的管理层施加压力,真的--如果顺利的话那终将发生,差不多再可以提一两个问题,再提两个问题然后我们就结束。
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You just change volume to pressure and basically you're looking at enthalpy under a constant -- anything that's done at a constant volume path with energy, there's the same thing happening under constant pressure path for enthalpy.
可以看到这就是把体积换成了压强,一般我们都是在一种恒定状态下,考虑焓的，任何在恒容条件下,能伴随能量变化的东西，也在恒压条件下伴随焓同样地变化,所以你可以经常。
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And maybe if it some well-defined temperature and pressure.
这两个态可以具备确定的,温度和压强。
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Let's take a system. Under constant pressure T1 V1, going to a second -- this is the system, so let me write the system here.
我们建立一个系统1,在恒定的压强T1，V1，下，变成了另一个系统，-这个初始的系统让我把它写在这。
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Over here, we have dq=Cp dT, the heat, the proportionality between heat - and temperature rise is given by this, the constant pressure heat capacity.
这里我有dq=CpdT，这是热量，这是联系热量,和温度变化的系数，恒压热容。
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