string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%85%AC%E5%85%83%E5%89%8D%E5%90%8E%E6%80%8E%E4%B9%88%E7%95%8C%E5%AE%9A%E7%9A%84 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
公元前后怎么界定的
