It's just a little block of memory in RAM, you know, that represents four bytes, 32-bits and the Number Two is currently in it.

它只是一小块内存块，它表示4个字节，32位,那个数字2就存储在里面。

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Conceptually, it's put at the top of my chunk of RAM, -- below it, goes initialized and uninitialized data -- - this is a fancy way of saying global variables come next -- and below that, comes what's called the heap.

概念上，它放置在内存块的顶端，在下面，已初始化的和未初始化的数据-,这是一种指明紧随其后的全局变量的设想方式-,在后来，引入了一个叫做堆的东西。

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When you double-click a program, it's loaded into RAM.

当你双击一个程序，它被加载到内存中。

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D-A-V-I-D So when you get a string like D-A-V-I-D, what's really happening is inside your computer's RAM is going a byte where there's some zeros and ones.

譬如你有这么一个字符串，而在你电脑的RAM里将会变成,一个个由0和1组成的字节。

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So that means if you-- whether you own a Mac, PC or whatever, you have a whole chunk of RAM memory which you can draw for instance as a rectangle, if you can't quite see.

也就是说，无论你的电脑是Mac也好，PC也好或其他什么的，你会有厚厚一块RAM存储器,我们可以把它画成长方形，你们有可能看不到。

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Now that's changing the more years that pass the more of you have 64-bit computers and the more servers have many, many gigabytes of RAM and so you need actually 64-bits, but for now let's assume a common system whereby a pointer just by definition of the homework is 32 bits.

现在计算机也在改变，也有更多的人,使用64位的计算机，更多的服务器有很多，很多G的内存，那样你就需要64位的，现在我们假设通常的系统中,根据家庭作业所定义的，一个指针为32位。

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Instead I'm going to be expecting the address of some int and the address of another int and thanks to this address I can literally find this address in RAM, do anything I want there, -- return and what I've just done is actually changed or mutate the values of those original variables.

我们所期望的是int型地址,和另外一个int型地址,幸亏这个地址，我可以找在RAM中找到它的地址，然后做我想做的事情，返回我处理后的东西,我可能改变了这些源变量。

哈佛公开课 - 计算机科学课程节选