一个即插即用系统有三个部份：基本输出入系统，装置和操作系统。
A plug and play system has three parts: the BIOS, the device, and the operating system.
操作系统声称支持即插即用功能。
The operating systems claim to support plug and play functionality.
即插即用装置必须接受端口而且引导来自操作系统的指定。
Plug and play devices have to accept port and channel assignments from the operating system.
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