string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%A1%AC%E7%9B%98%E4%BD%8E%E6%A0%BC%E5%90%8E%E8%BF%98%E8%83%BD%E7%94%A8%E5%A4%9A%E4%B9%85 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
硬盘低格后还能用多久
