Our constraint is going to be an adiabatic expansion or compression.
现在约束改成了,绝热膨胀，或者压缩。
We know in an adiabatic expansion the system's going to cool.
我们知道在绝热膨胀过程中，系统温度会降低。
Here comes an adiabatic expansion, to point three.
通过绝热膨胀到，第3点。
This kind of expansion, made without adding heat, is called an adiabatic expansion.
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.
我们把这种不加进热量的膨胀称为绝热膨胀。
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