因为进程切换很频繁，所以减小花在保存和装载硬件上下文上的时间就变得很重要了。
Because process switches occur quite often, it is important to minimize the time spent in saving and loading hardware contexts.
硬件上下文是进程执行上下文的子集，进程执行上下文包括了进程执行的所有信息。
The hardware context is a subset of the process execution context, which includes all information needed for the process execution.
这些数据，必须在进程唤醒之前被装载到寄存器，称为硬件上下文。
The set of data that must be loaded into the registers before the process resumes its execution on the CPU is called the hardware context.
这些数据，必须在进程唤醒之前被装载到寄存器，称为硬件上下文。
The set of data that must be loaded into the registers before the process resumes its execution on the CPU is called the hardware context.
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