They are a function of the instant atomic arrangement, how we arrange the atoms: same composition, simple example, one inch thick pine board, one inch thick plywood.

那是即时的原子排序,的功能，我们如何排序原子，同样的成分，简单的例子，一英寸厚的松木板，一英寸厚的胶合板。

麻省理工公开课 - 固态化学导论课程节选

What I did was I differentiated this fairly simple function with respect to q1 and since I want to find a maximum, what I'm going to do is I'm going to set this thing equal to 0.

只不过是对q1求导了,既然我们要求出最大值,只需要令导数等于0就可以了

耶鲁公开课 - 博弈论课程节选