Access the root hub through the UsbServices.
通过UsbServices访问root hub。
The root hub is considered as a UsbHub in the application.
在应用程序中root hub就是一个UsbHub。
Obtain a list of the UsbDevices that are connected to the root hub.
获得连接到root hub的UsbDevice s清单。
A hub is at the center of each star, and the USB host is considered the root hub.
一个hub是每个星形的中心，usb主机被认为是root hub。
The basic functionality of USB OHCI root hub is the foundation of the root hub design.
USBOHCI根集线器的基本功能是根集线器设计的基础。
A Device can be accessed directly from the Host with its PortIdentifier, or can be found by traversing the USB Bus starting from the root hub.
可以用一台Device的PortIdentifier直接从Host访问它，也可以通过从root hub开始遍历usbBus找到它。
The program as written simply looks at the root hub for available USB devices, but it would be easy to improve it to traverse the whole USB tree.
这个程序编写为只是查看root hub上可用的USB设备，但是很容易将它改为遍历整个 USB 树。
Drag onto the page. Drag yellow diamonds to resize hub circle, root circle, and outside diameter.
拖到绘图页上。拖动黄色菱形可调整中心圆、齿根圆和外径的大小。
Drag onto the page. Drag yellow diamonds to resize hub circle, root circle, and outside diameter.
拖到绘图页上。拖动黄色菱形可调整中心圆、齿根圆和外径的大小。
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