To dry parsley, tie the plant stems together and hang them upside down in a warm, dark,airy place.

VOA: special.2009.06.02

You take fuel, rather you take something that's warm, and you put it in contact with the atmosphere, it cools down.

改变约束,继续加热,气体膨胀。

麻省理工公开课 - 热力学与动力学课程节选