And you can do it in one-group theory or multi-group theory. One-group theory assumes that the neutron energy and everything is going on at one energy and we have to make some adjustments.

你能够在单群理论或这多群理论里，单群理论假设，中子能量和所有的东西，要达到一个能量，我们必须要做出些调整。

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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。

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The legal position of a one-person company has been denied by the theory of traditional company law with the lack of group personality as a major reason.

传统公司法理论以缺乏团体人格为主要理由，否认一人公司的法律地位。

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