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.
调节温度和混合气体的压强，模拟海平面以上各种高度的大气状态。
They adjust the temperature and pressure of the mix to mimic conditions at various heights above sea level.
如果把气体装进容器里，容器内各处气体的压强，应该是一样的，否则它就不是平衡的。
If I've got a gas in a container, the pressure of the gas has to be the same everywhere in the container, otherwise it's not equilibrium.
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