string(329) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%80%89%E6%8B%A9%E5%90%88%E9%80%82%E7%9A%84%E5%85%B3%E8%81%94%E8%AF%8D%E6%8A%8A%E4%B8%8B%E9%9D%A2%E7%9A%84%E5%8F%A5%E5%AD%90%E5%90%88%E5%B9%B6%E6%88%90%E4%B8%80%E5%8F%A5%E8%AF%9D => Received HTTP code 403 from proxy after CONNECT"
选择合适的关联词把下面的句子合并成一句话
