Right now, And that has created problems - like in January, when a gas pricing dispute with Ukraine cut energy supplies and left a number of Europeans without heat.

VOA: standard.2009.05.08

it's kind of like the Joule expansion, an ideal gas.

焦耳-汤姆逊膨胀过程相似。

麻省理工公开课 - 热力学与动力学课程节选

it's kind of like the Joule expansion, an ideal gas.

焦耳-汤姆逊膨胀过程相似。

麻省理工公开课 - 热力学与动力学课程节选