"If we get to the summer of 2011 and people do not feel that we have made real progress, then I do not think there is an appetite here - or an appetite in the U.S.- to say, 'Well let us have another go and another go.'

VOA: standard.2010.08.04

So let's -- we'll go to a brand new color, TS define A as u minus TS.

我们用一种新的颜色，定义A等于u减去。

麻省理工公开课 - 热力学与动力学课程节选

H Now, let's go back to our older friends u and H.

回到我们的老朋友u和。

麻省理工公开课 - 热力学与动力学课程节选