现在让压强趋于，现在测量气体的压强，和摩尔体积。
So, you do this measurement, you measure with the gas, you measure the pressure and the molar volume.
或者气体的摩尔体积减去液体的摩尔体积,你可以忽略液体,和固体的体积。
Or the volume of the gas minus the volume of the liquid you might as well ignore the volume of the liquid or of the solid.
第一个近似是，你会发现气体的摩尔体积，远远大于固体，和液体的摩尔体积。
So the first approximation is, you can realize that the molar volume of the gas is always much bigger than the volume of the solid or the liquid.
摩尔体积发生了很小的改变，如果你试图使气体分子间相互碰撞，他们不能占据同一个位置。
The molar volume is being changed a little bit trying to make things collide with each other, they can't occupy the same volume.
摩尔体积发生了很小的改变，如果你试图使气体分子间相互碰撞，他们不能占据同一个位置。
The molar volume is being changed a little bit trying to make things collide with each other, they can't occupy the same volume.
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