string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BB%8B%E7%9F%B3%E7%9A%84%E4%BB%8B%E6%80%8E%E4%B9%88%E7%90%86%E8%A7%A3 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
介石的介怎么理解
