string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B1%BD%E8%BD%A6%E7%A9%BA%E8%B0%83%E6%9C%89%E6%97%B6%E5%80%99%E4%B8%8D%E5%B7%A5%E4%BD%9C => Failed to connect to 61.171.74.35 port 38027: Connection refused"
汽车空调有时候不工作
