说明：  usbhostDriver, 设计USB的目标就是使不同厂家所生产的设备可以在一个开放的体系下广泛的使用。该规范改进了便携商务或家用电脑的现有体系结构，进而为系统生产商和外设开发商提供了足够的空间来创造多功能的产品和开发广阔的市场，并不必使用陈旧的接口，害怕失去兼容性。
(usbhostDriver, the design goal of USB is to be produced by different manufacturers of equipment can be in an open system widely used. Norms to improve the portability of the business or home computer s existing architecture, then the system peripherals manufacturers and developers to provide sufficient space to create a multi-functional products and the development of a broad market, and do not have to use the old interface, fear the loss of compatibility.)