哼哼郭Eva
材料：material原材料：raw material key is made of Iron用***做成，be made of, be made from,如果能从外观看出原材料的材质，则用be made of,如果不能看出材质，则用be made from.例如this bridge is made of stone.这座桥是石制的（外观可以看出材料）paper is made from wood. 纸是木头做成的（外观看不出材料）
碗碗小公主
钢铁 steel不锈钢 stainless steel合金 alloy铜 copper银 silver铁 iron木头 wood塑料 plastic橡胶 rubber纤维 fiber
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