string(245) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E9%80%9F%E5%8D%95%E4%BD%8Dmbps%E4%B8%8Embs%E7%9A%84%E5%8C%BA%E5%88%AB => Failed to connect to 61.171.74.35 port 38041: Connection refused"
网速单位mbps与mbs的区别
