Here there's an expansion going on, so the system is doing work to the external world.

这里发生了膨胀,所以系统对外界做功，活塞被推出来。

麻省理工公开课 - 热力学与动力学课程节选

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。

麻省理工公开课 - 热力学与动力学课程节选

People never thought of insurance as the same as a bank, but since this is relatively recently-- that was only nine years ago--at this time, it means that we are now seeing an expansion of our banking system in the U.S.

人们从来不认为保险和银行是一回事,但是从那法案之后它们就是差不多的了,这只不过是九年前的法案,但是现在,这意味着在美国,银行系统得到了扩张

耶鲁公开课 - 金融市场课程节选