Partly to show you that it's kind of weird, but also to tell you that one of the things you want to do is exercise what I'm going to call some type discipline.

一定程度上来说这有点儿怪，但是还是想要告诉你们的是,你们需要做一些,我称之为类型规范的练习。

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and exercise on a regular basis. It really doesn't matter what you do.

定时锻炼。怎么锻炼都不重要。

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So you really want to think about why we're modeling, what do we get from this exercise?

你们要多问问自己为什么要建模,我们能从这些模型中学到些什么

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