什么是材料( materia? 材料是人类社会所能接受的、可经济地制造 有用物品的物质。 Materials is the stuff from which a thing is made for using 天然材料人工材料什么是材料(materials)? Materials is the stuff from which a thing is made for using. 材料是人类社会所能接受的、可经济地制造 有用物品的物质。 天然材料 人工材料