Chapters 2 and 4 are really reviews of things that you probably already know something about, so they're reviews of basic chemistry.

第二章和第四章是对,一些你可能已经知道的,基础化学,蛋白质及生物化学知识的复习

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And it's like, you wouldn't get these kind of opportunities if you didn't know the right people, you know.

这就是，要是你不认识对了人，你是得不到这些机会的，你知道。

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You'd pull out your pencil and paper, you can do it as a matrix inversion if you know how to do that, or you can just simply do substitution of one equation into another to solve it.

你知道你在小学的时候是怎么做的对吧？,你拿出你的笔和纸,如果你会的话,你可以解一个方程组,或者你可以单纯地。

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Okay. Now this gentleman out here is actually doing it different from what I am doing and what most of you are doing but you know what? He's doing it correctly.

这位先生,和我做的不太一样,甚至和在座各位做的不太一样,但你知道吗,他做的是对的

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