虚拟显示设备驱动程序 Virtual Display Device Driver ; VDDD
这个虚拟文件还显示当前与这些文件系统相关联的设备。
This virtual file also shows the devices currently associated with the file systems.
安装在便携式设备上的触摸屏有特殊的吸引力，因为虚拟按钮与其它控制程序只有在需要时才显示。
Touch screens have particular appeal in portable devices because virtual buttons and other controls appear on screen only when required.
应用程序虚拟化是指把程序的执行与程序的显示分隔开；换句话说，程序在服务器上运行，但是把图形化输出发送到远程客户机设备。
Application virtualization refers to a separation of program execution from program display; in other words, a program executes on a server, but the graphical output is sent to a remote client device.
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