整个系统分为三部分：采集电路、USB接口电路以及主机显示。
The whole system is composed of three parts: the image acquiring circuit, the USB interface circuit and the video display port.
接收所有度量数据的主机可以显示这些数据并且可以将这些数据的精简表单传递到层次结构中。
The host which receives all the metrics can display them and can pass on a condensed form of them up a hierarchy.
返回主机屏幕上显示的文本。
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