Every time a memory location is addressed for program instructions or data, a virtual address is translated into a physical or real memory address.

每次为程序指令或数据处理内存位置时，都需要将虚拟地址转换成物理(或实际)内存地址。

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Because it's not possible to determine the number of bytes to be accessed from a memory location, a method is needed to find out the amount of memory addressed.

因为不可能决定从一个内存位置开始访问的字节数，所以需要用一个方法计算访问的内存量。

youdao

Because it's not possible to determine the number of bytes to be accessed from a memory location, a method is needed to find out the amount of memory addressed.

因为不可能决定从一个内存位置开始访问的字节数，所以需要用一个方法计算访问的内存量。

youdao