sherryaigigi
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
虎潜山林
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）
王小若1127
好歹也是个专家,Information source :material source [简明英汉词典]材料源资料 [简明汉英词典]datadatuminformation
嘟嘟的Daddy
名词 n. 1.材料,原料[C][U] material（s)eg.Wood and stone are the only raw materials on the island. 木材和石头是这个岛上仅有的原材料。
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