短语词组短語desert vegetation belt 荒漠植被帶desert transition belt 荒漠過渡帶desert transitional belt 荒漠過渡帶oasis desert transitional belt 綠洲與荒漠交錯帶oasis -desert transitional belt 綠洲荒漠過渡帶desert -loess boundary belt 沙漠 返回 desert belt