string(266) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A6%82%E4%BD%95%E6%8E%A8%E5%B9%BF%E6%99%AE%E9%80%9A%E8%AF%9D%E7%9A%84%E5%BB%BA%E8%AE%AE6%E6%9D%A1 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
如何推广普通话的建议6条
