A 196-YEAR PRECIPITATION RECONSTRUCTION BASED ON TREE-RING WIDTH IN THE HELAN MOUNTAINS OF NORTH CHINA AND THE PRECIPITATION VARIABILITY是什么意思_A 196-YEAR PRECIPITATION RECONSTRUCTION BASED ON TREE-RING WIDTH IN THE HELAN MOUNTAINS OF NORTH CHINA AND THE PRECIPITATION VARIABILITY在线翻译_英语_读音_用法_例句