Vichai Sriprasert,honorary president of the Thai Rice Exporters Association, says further weakness in the U.S.dollar and concerns over drought in India add to pressure on prices.

VOA: standard.2009.12.17

Because it's so important. And I should add and also under reversible work, where the external pressure is equal to the internal pressure.

而且我还要说应该在外部压强,和内部压强相等的,可逆过程中引入它。

麻省理工公开课 - 热力学与动力学课程节选

Here we have a fixed volume, and we have a little candle, and we're adding heat, and when we add heat, the pressure does what?

这里我们有一个容器，一个蜡烛，然后我们加热，这时压强会怎么变化？

麻省理工公开课 - 热力学与动力学课程节选