string(277) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BE%8E%E5%9B%BD%E4%B8%BA%E4%BB%80%E4%B9%88%E6%89%BF%E8%AE%A4ufo%E7%9A%84%E7%A1%AE%E5%AD%98%E5%9C%A8%E5%91%A2 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
美国为什么承认ufo的确存在呢
