string(309) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BB%80%E4%B9%88%E6%98%AF3d%E7%94%B5%E5%BD%B1%2C3d%E7%94%B5%E5%BD%B1%E7%9A%84%E5%8E%9F%E7%90%86%E5%8F%8A%E8%A7%82%E7%9C%8B%E6%96%B9%E5%BC%8F => Failed to connect to 101.91.112.32 port 38195: Connection refused"
什么是3d电影,3d电影的原理及观看方式
