Longdong region is hilly and gully region of Loess Plateau, northwest territory of high and steep mountainous, hilly south-eastern, central valley clouds, with an average altitude of 1540 meters.是什么意思_Longdong region is hilly and gully region of Loess Plateau, northwest territory of high and steep mountainous, hilly south-eastern, central valley clouds, with an average altitude of 1540 meters.在線翻譯_英語_讀音_用法_例句