The preliminary Discussion on the evolving tendency of the regional eco-environment of Hei Dai Gou open-cut coal mine in Zhun Geer Banner of Inner nongolia是什么意思_The preliminary Discussion on the evolving tendency of the regional eco-environment of Hei Dai Gou open-cut coal mine in Zhun Geer Banner of Inner nongolia在线翻译_英语_读音_用法_例句