natural material 的译意!

natural material 的译意! stuffing material is natural 90% down 10% waterfowl 90%duvet recycled material,recyling material,recyclable material的区别,那 material的意思 Material natural substance与material的区别? matter substance material的区别 physical和material的区别? 皮鞋的material什么意思 李贞贤的专辑《I LOVE NATURAL》里的natural是什么意思? natural display的计算器是什么意思?