This cools the inner pot and helps keep food safe from harmful bacteria.

VOA: special.2009.02.09

So when I expand this gas adiabatically and it cools down, why do you think it might cool down?

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？

麻省理工公开课 - 热力学与动力学课程节选

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

Once the glass form cools completely, it is taken off the metal stick.

VOA: special.2009.09.16

It cools down because I'm doing work but the energy has to go somewhere, right?

因为膨胀过程中,对外做功？

麻省理工公开课 - 热力学与动力学课程节选

Once the dye cools, remove the wool and wash it.

VOA: special.2010.08.02

After it cools, remove the wool and wash it.

VOA: special.2010.08.02

Remove the skins after the dye cools.

VOA: special.2010.08.02

The ice also cools the air.

VOA: special.2009.05.05