string(292) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%84%B8%E8%B0%B1%E9%A2%9C%E8%89%B2%E6%89%80%E4%BB%A3%E8%A1%A8%E7%9A%84%E6%84%8F%E4%B9%89%E6%98%AF%E4%BB%80%E4%B9%88%E5%91%A2 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
脸谱颜色所代表的意义是什么呢
