So let's take a look down here at what I'm doing and notice here that this is perhaps more compelling; right?
让我们往下看一下我在做什么,请注意这里这个可能是更引人入胜的,对不?
Anybody who doesn't have it please raise your hand and one of the teaching fellows will bring it to you.
没有拿到这张纸的请举手,让教学助理拿一份给你。
Before I do that though, let me try and give you an analogy to keep this in mind of why we want to basically build these abstractions and what we need in order to have them work together.
在我们看例子之前请让我打个比方,以便你们能记住我们,为什么要建立这些抽象,以及要使它们协调工作,我们需要做些什么。
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