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。
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.
这就是需要记住的公式，以上这些公式可以作为积分的例子。
That is the formula I have in mind. But, see, all these formulas just give you examples of things to integrate.
这些名词都是指记忆的行动、一具体记忆例子或记住的事件。
These nouns denote the act or an instance of remembering, or something remembered.
这些名词都是指记忆的行动、一具体记忆例子或记住的事件。
These nouns denote the act or an instance of remembering, or something remembered.
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