string(292) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%AE%A4%E5%86%85%E5%85%BB%E6%AE%96%E7%A7%8D%E6%A4%8D%E6%8E%A7%E5%88%B6%E6%96%B9%E6%A1%88%E5%AF%B9%E6%AF%94%E7%A0%94%E7%A9%B6 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
室内养殖种植控制方案对比研究
