现在约束改成了,绝热膨胀，或者压缩。
Our constraint is going to be an adiabatic expansion or compression.
通过绝热膨胀到，第3点。
我们知道在绝热膨胀过程中，系统温度会降低。
We know in an adiabatic expansion the system's going to cool.
我们把这种不加进热量的膨胀称为绝热膨胀。
This kind of expansion, made without adding heat, is called an adiabatic expansion.
这时点燃的气体作近似的绝热膨胀而向下推动活塞。
The piston is now forced down, the burned gases expanding approximately adiabatically.
现在我们知道了气体绝热膨胀时，温度会下载，为什么会降温？
So when I expand this gas adiabatically and it cools down, why do you think it might cool down?
经典大气热力学中的湿绝热过程和假绝热膨胀过程也只是它的一种特殊情况。
Of course, the moist adiabatic process and the pseudo adiabatic process in classical atmosphere thermodynamics are also its special instance.
分析了空气比热容比测定实验的系统误差，提供一种对“绝热膨胀过程”中由于不完全绝热而引起的系统误差进行修正的实验方法。
The system errors in the experiment of measuring air specific heat ratio was analyzed and the experimental method for correction was presented.
分析了空气比热容比测定实验的系统误差，提供一种对“绝热膨胀过程”中由于不完全绝热而引起的系统误差进行修正的实验方法。
The system errors in the experiment of measuring air specific heat ratio was analyzed and the experimental method for correction was presented.
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