Here's yB. The gas mole fraction.
这是yB，气相摩尔分数。
So that's our mole fraction of B.
这就是B的摩尔分数。
摩尔分数很小。
气体摩尔分数。
B so it's got some mole fraction of B.
其中有一些摩尔分数的。
So this is the mole fraction of the liquid.
这是液相的摩尔分数。
Well it's the mole fraction of a in the gas.
这是气体中a的摩尔分数。
So what's the mole fraction of B in the gas phase?
那么B在气相中的摩尔分数是多少？
So, here is the liquid mole fraction at temperature two.
好，这是二点温度下的液态摩尔分数。
PROFESSOR: No. Because, so it's the mole fraction in the gas phase.
教授：不，因为这是气态中的摩尔分数。
And you'll have some different mole fraction than you started with before.
你会和之前开始的时候，有不同的摩尔分数。
OK, so we're going to look at temperature and mole fraction phase diagrams.
好，让我们看看温度,和摩尔分数相图。
So this is the one that's showing us the mole fraction in the liquid phase.
这是告诉我们,液相摩尔分数的曲线。
You decrease the mole fraction of the less volatile material in the gas phase.
更不易挥发的物质，在气相中的，摩尔分数减小了。
So that means just reading off it, this is xB, that's the liquid mole fraction.
直接读出来，可得是xB，是液相摩尔分数。
Now, of course, since this is a mole fraction, it's always between zero and one.
现在，当然，由于这是摩尔分数，它总是处于零到一之间。
And if we go over here, this is telling us about the mole fraction in the gas phase.
如果我们到达那，它告诉了我们气相的摩尔分数。
And for each component we have to describe its mole fraction in that particular phase.
对每一个组分我们都要知道，它在各个相中的摩尔分数。
The higher mole fraction of hydrophobe, the stronger viscosity enhancement effect.
且疏水单元摩尔分数越高，盐增黏效应越显著。
It's not easy to calculate a priori what it's going to do all the way across the phase diagram for any mole fraction.
对于任一摩尔分数，去预计它穿越相图，会做什么并不容易。
The constraint is that the sum of all the mole factions has to be equal to one That's what it is, to be a mole fraction.
约束条件是,所有摩尔分数之和等于1。,这就是摩尔分数的意义。
x So the mole fraction at any time is n minus x divided by the total number of moles, x which we just calculated as n plus x.
任何时候的摩尔分数是n减,除以总摩尔数，就是我们计算的n加。
Now, you can draw the same diagram in, instead of pressure, mole fraction, you can draw the same diagram in terms of temperature.
现在，我们画相同的相图，但是不是压强和摩尔分数，而是温度的相图。
Average relative deviations between calculated values and experimental data of gas phase mole fraction were all less than 0.78%.
汽相摩尔分数的实验值和计算值的平均相对偏差均小于0.78%。
That means I could follow the same sort of procedure that I indicated before when we looked at the pressure mole fraction phase diagram.
这意味着我们可以用，之前压强摩尔分数，相图里类似的方法。
And the point is, now we're going to start, since the mole fraction in the gas phase that we're starting from is the same number as this was.
我们从这一点开始，因为气态的摩尔分数不变，我们从之前相同的数字开始。
Modified meta-aramid(PMIA) copolymer with TPC mole fraction of 0.05~0.15 was prepared by low-temperature-solution polycondensation in DMAc.
采用低温溶液法共缩聚反应合成了对苯二甲酰氯（TPC）摩尔分数为0.05~0.15的改性间位芳香族聚酰胺（ PMIA）共聚物。
For a given media, and at a constant total pressure and temperature, the partial pressure of oxygen is proportional to oxygen mole fraction.
对一个给定的媒介，在恒定的总压和温度下，局部压力与氧的克分子数成比例。
So in general, we don't have a simple analytical expression for what the pressure is going to do as a function of mole fraction a ll the way from zero to one.
所以通常来说，我们不会有，一个简单的解析式，描述压强，作为摩尔分数从零到一，的函数的变化形式。
And the point here is that unlike this case, where you have a linear relationship, the relationship between the pressure and the liquid mole fraction isn't linear.
关键点在于与这个情况不同，这里我们有的是一个线性的关系，压强和液相摩尔分数的关系不是线性的，我们仍然可以把它画出来。
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