materials rate材料率materialsn.原料；素材名词material的复数形式.materials protection材料保护materials enterprise物资企业materials in storage库存材料materials consumption材料消耗materials hot working材料热加工materials preparation材料制备materials measurement材料测试materials for salvage抢救品, 挽回损失物资materials circulation物资流通materials informatics材料信息学