string(303) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9B%91%E6%8E%A7%E5%AE%9A%E7%A0%81%E7%8E%87%E5%92%8C%E5%8F%98%E7%A0%81%E7%8E%87%E7%9A%84%E5%85%B3%E7%B3%BB%E6%98%AF%E4%BB%80%E4%B9%88 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
监控定码率和变码率的关系是什么
