执行过程中的一个阶段所需的时间，在此期间，计算机从主存储器中取出指令或操作数，并将其存入控制器或运算器的寄存器中。
The part of execution in which an operand or instruction is read from main storage and written into a control unit or arithmetic unit register.
在接下来的时间从主存储器中取出指令和解释的处理器的指令控制器。
The time during which the next instruction is fetched from main memory and interpreted by the processor's instruction control unit.
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