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

According to chemical dynamics principle and internal diffusion theory, a no-brittle fast nitriding method has been developed.

依据化学动力学原理和内扩散理论，研制成功了无脆性快速气体渗氮新工艺。

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