And because most of the new immigrants are people of color, cultural adjustments must be made by all groups in America if we are to learn to live together as one nation."

VOA: special.2011.03.20

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