string(227) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%89%98%E7%A6%8Fetsid%E7%94%9F%E6%88%90%E5%BE%88%E6%85%A2 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
托福etsid生成很慢
