Simulation in real time.One computer emulates another by executing an emulato r in such a way as to behave like the latter(for instance,it interprets the sa me instruction set.

• 实时的模拟，一台计算机通过执行类似被模拟计算机的行为的仿真程序来模拟该计算机（例如，它解释相同的指令集）。