string(270) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%80%8E%E4%B9%88%E6%B8%85%E7%90%86%E6%B2%A1%E7%94%A8%E7%9A%84%E4%B8%9C%E8%A5%BF%E5%9B%BE%E7%BA%B8 => Failed to connect to 101.89.159.206 port 38075: Connection refused"
cad怎么清理没用的东西图纸
