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。
Every time a memory location is addressed for program instructions or data, a virtual address is translated into a physical or real memory address.
在电传打字机上键入几条指令，几秒钟后程序数据处理机即会反馈回信息。
Type in a few instructions on the teletype machine and a few seconds later the PDP would type back its response.
程序是告诉计算机如何将数据处理成你想要的形式的指令。
Programs are the instructions that tell the computerhow to process data into the form you want.
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