通用串行总线(usb)是一种高传输速率的串行接口总线，它具有即插即用、易于扩展和传输速率高等特点。

Universal serial bus (USB) is a kind of the serial buses with high speed on transmission. It has such advantages as Plug and Play, easy to be expanded and high speed on transmission.

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通用串行总线(usb)是一种高传输速率总线接口，它具有即插即用和易于扩展等特点。

Universal serial bus (USB) is a kind of the serial interface buses with high transfer speed. It has such advantages as Plug and Play, being prone to be expanded.

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