string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%99%BE%E8%AF%8D%E6%96%A9%E6%80%8E%E4%B9%88%E5%8A%A0%E5%85%A5%E8%87%AA%E5%B7%B1%E7%9A%84%E5%8D%95%E8%AF%8D => Failed to connect to 14.18.117.71 port 38220: Connection refused"
百词斩怎么加入自己的单词
