string(312) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E5%9B%BD%E5%8E%86%E5%8F%B2%E7%9A%84%E5%85%AC%E5%85%83%E5%89%8D%E5%92%8C%E5%85%AC%E5%85%83%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB => Failed to connect to 101.89.143.195 port 38205: Connection refused"
中国历史的公元前和公元有什么区别
