bit是2进制，flag是标志，意思就是定时300ms的标志位置1。猜测是这样的
This home : 300 Flagstone Dr $269,945 3 2 1,805 12,632 302 Flagstone Dr, Brandon, MS 39042 N/A 3 - N/A N/A 304 Flagstone Dr, Brandon, MS 39042 N/A 3 - 1,745 8,356 211 Stonebridge Blvd, Brandon, MS 39042 N/A 3 - N/A N/A 403 Sand Stone Pl, Brandon, MS 39042 ...