string(230) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B8%A6%E5%AE%BDhz%E6%80%8E%E4%B9%88%E6%8D%A2%E6%88%90bit%2Fs => Failed to connect to 101.91.112.32 port 38162: Connection refused"
带宽hz怎么换成bit/s
