string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B1%8B%E9%A1%B6%E5%85%89%E4%BC%8F%E7%9A%84%E4%BD%9C%E7%94%A8 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
屋顶光伏的作用
