说明：  纯粹的BSP所包含的内容一般说来是和系统有关的驱动和程序，如网络驱动和系统中网络协议有关，串口驱动和系统下载调试有关等等。离开这些驱动系统就不能正常工作。
(BSP pure content and systems in general is related to the driver and procedures, such as a network drive and systems network protocols, and serial drivers and system debugging related downloads and so on. To leave these drive systems will not be able to work properly.)