It's constant pressure. OK, so now, last time you looked at the Joule expansion to teach you how to relate derivatives like du/dV.

这是恒压的，好，上节课你们,学习了焦耳定律,以及怎样进行导数间的变换。

麻省理工公开课 - 热力学与动力学课程节选

OK, so we ended up last time, we talked about Joule-Thomson expansion, which is an irreversible expansion through a nozzle, through a porous plug, constant enthalpy expansion.

上节课，我们讨论了焦耳-汤姆逊，膨胀过程,也就是气体，通过毛细管。

麻省理工公开课 - 热力学与动力学课程节选

Next time, I will take up the story of the expansion of the world of the polis, which takes the form of colonization.

下一次课,我们从城邦的扩张说起,这也是之后殖民统治的雏形

耶鲁公开课 - 古希腊历史简介课程节选

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