string(277) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=dnf%E5%88%86%E8%A7%A3%E6%9C%BA%E7%AD%89%E7%BA%A7%E9%AB%98%E4%BD%8E%E6%9C%89%E4%BB%80%E4%B9%88%E4%B8%8D%E5%90%8C => Failed to connect to 14.18.117.71 port 38093: Connection refused"
dnf分解机等级高低有什么不同
