GPS Track connects to a GPS and records the path that you travel. Tracks can be uploaded to a web site, sent by email, transferred via Bluetooth, or written to a flash memory card.-GPS Track connects to a GPS and records the path that you travel. Tr

深度优先遍历图结构，得到图的路径，可用于追踪-Depth-first traversal of the graph structure map path, can be used to track

这个代码可以追踪访问者经过怎样的的路径到达你的网站，可用于广告推荐的实现。-This code can track visitors how the path to reach your site, can be used for advertising recommended to achieve.