在来宾操作系统的驱动程序窥探内存和硬件寄存器时，软件存在于下面来仿真设备（参见图 2）。

When the guest operating system's driver peeks and pokes at the memory and hardware registers, software exists underneath to emulate the device (see Figure 2).

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因此，虚拟机系统看起来好像是在一个只有1 GB内存的硬件(其实就是一个虚拟机服务器)上运行。

Therefore, that virtual system appears to be running on a piece of hardware (that is, a virtual server) with only 1gb of memory.

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我们很高兴不用再操心垃圾回收、内存管理和硬件差异。

We've happily given away responsibility for garbage collection, memory management, and hardware differences.

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