For the USB modules, because the USB standard commands and USB state are processed nearly fully automatically with hardware, system development is simple.
因为对usb模块几乎完全靠硬件自动处理usb标准命令和usb状态，所以系统开发较为容易。
For the USB modules, because the USB standard commands and USB state are processed nearly fully automatically with hardware, system development is simple.
因为对usb模块几乎完全靠硬件自动处理usb标准命令和usb状态，所以系统开发较为容易。
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