When users need a block of memory, they make a request for a given size.

当用户需要一块内存时，就请求给自己分配一定大小的内存。

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Memory-mapped files are an operating system feature that links a block of memory to a file.

内存映射文件是把一块内存连接到一个文件的操作系统特性。

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An overflow occurs when data is added to the buffer outside the block of memory allocated to the buffer.

溢出是指数据被添加到分配给该缓冲区的内存块之外。

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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。

哈佛公开课 - 计算机科学课程节选

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