string(260) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=3d%E7%94%B5%E5%BD%B1%E6%98%AF%E6%80%8E%E4%B9%88%E5%AE%9E%E7%8E%B0%E7%9A%84%E7%9F%A5%E4%B9%8E => Failed to connect to 101.89.159.206 port 38100: Connection refused"
3d电影是怎么实现的知乎
