So, today we're moving on, we're talking about Lewis structures.

那么，今天我们接着讲，继续讨论路易斯结构。

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We remember that Lewis structures are an idea that are pre-quantum mechanics.

我们记得路易斯结构是一个，早于量子力学的概念。

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So, to do this, what I'm going to do is introduce the topic of Lewis structures.

那么，了做到这一点，我将开始介绍,路易斯结构。

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So we'll talk specifically about drawing Lewis structures and then about formal charge and resonance, which are within Lewis structures.

因此我们会专门讲一讲,如何来画路易斯结构,然后再讨论形式电荷与共振论，它们也属于路易斯结构的范畴。

麻省理工公开课 - 化学原理课程节选

So now that we have enough practice drawing Lewis structures let's talk about actually figuring out this formal charge.

那么现在我们已经做了足够多的画路易斯结构的练习,让我们来讨论一下如何得出形式电荷。

麻省理工公开课 - 化学原理课程节选

So he came up with the ideas that led to the idea of Lewis structures in the very early 1900's.

他就提出了这个想法,进而发展出了路易斯结构在二十世纪初。

麻省理工公开课 - 化学原理课程节选

But Mr Lewis said he believes is it is necessary to mandate such structures in building work.

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