string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=dy%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D%E7%BD%91%E7%BB%9C%E8%AF%AD%E8%A8%80 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
dy是什么意思网络语言
