物理地址：真实的地址，其值必须被置于系统地址总线中用于选择物理存储位置或者设备。
A "real" address the value that must be placed on the system address bus to select a physical memory bank or device.
物理地址：真实的地址，其值必须被置于系统地址总线中用于选择物理存储位置或者设备。
A "real" address the value that must be placed on the system address bus to select a physical memory bank or device.
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