string(268) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%81%9A%E6%89%8B%E6%9C%BAapp%E5%BC%80%E5%8F%91%E7%9A%84%E5%B7%A5%E4%BD%9C%E5%8F%AB%E4%BB%80%E4%B9%88 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
做手机app开发的工作叫什么
