To understand that you have core power distribution that you can calculate using diffusion theory but that core power distribution creates a flux.

理解你的核心动力分布，你能计算使用扩散理论，但是核心动力分布创造了一个流量。

youdao

Let me now try and introduce the Boltzmann equation because it basically gives us a much deeper appreciation than diffusion theory can in terms of what's going on.

我现在尝试介绍波尔兹曼方程，因为它给你们一个比扩散理论，更深刻的理解，在解释，发生的事情方面。

youdao

Okay now we're going to talk about one-group diffusion theory and we're going to explain a bit about why we call it diffusion theory.

好了现在，我们要谈论单群，扩散理论，我们要解释一下，为什么我们称它为扩散理论。

youdao

Recent genetic studies generally contradict an earlier theory held by some archeologists that farming spread by cultural diffusion.

WSJ: Migrations Spurred Agriculture Spread, Studies Indicate