string(310) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9F%AD%E8%B7%AF%E4%B8%8E%E6%96%AD%E8%B7%AF%E6%9C%89%E4%BB%80%E4%B9%88%E7%9B%B8%E5%90%8C%E5%92%8C%E4%B8%8D%E5%90%8C%E4%B9%8B%E5%A4%84%E5%90%97 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
短路与断路有什么相同和不同之处吗
