[, ]a substance that things can be made from 原材料◆building materials (= bricks, sand, glass, etc.)建筑材料◆recycled materials再生材料◆They produce insulating materials for the electrical industry.他们生产电力工业用的绝缘材料。things that are needed in order to do a particular activity材料◆cleaning/packaging materials清洁／包装材料written information, ideas, etc. used for a particular purpose资料；素材◆The company produces its own training material.这家公司自编培训教材。◆marketing/promotional materials营销／促销资料bill of materials collateral material direct materials raw material