string(232) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cpu%E6%80%A7%E8%83%BD%E8%B7%9F%E4%BB%80%E4%B9%88%E6%9C%89%E5%85%B3 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
cpu性能跟什么有关
