string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B8%A6%E5%AE%BDmbps%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D%E5%91%80 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
带宽mbps是什么意思呀
