早期的程序设计利用机器代码指令在裸机层次上完成。
Early programming was done at the bare machine level, using machine code instructions.
我们也要研究一下一台计算机的几条基本的机器代码指令。
We shall also examine a few of the basic machine code instructions for one computer.
每个字节位移用于标识一个机器代码指令使用的内存地址。
Each byte offset identifies a memory address used by a machine code instruction.
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