This has been one of the major reasons for explaining the function of the phalanx as I will explain it to you.

而我下面所要解释的方阵的作用,也就是问题的答案

耶鲁公开课 - 古希腊历史简介课程节选

We can use the Coulomb force law to explain this where we can describe the force as a function of r.

我们用库伦定律解释它,力作为距离r的函数,让我们考虑一下。

麻省理工公开课 - 化学原理课程节选