Comprehensive practice an activity; Community resources; Participate a life; Experience life; Backlog material.
综合实践活动；社区资源；参与生活；体验生活；积累素材。
Because not material, material manufacturers often recommend to you some of the backlog of material and high profit goods.
由于不懂材料，材料商往往会向你推荐利润高的材料及一些积压货。
Is a company engaged in waste, waste material, the backlog of inventory, used equipment, etc. (including production scrap metal) recycling companies.
是一家从事废品、废旧物资、积压库存、废旧设备等(含生产性废金属)回收公司。
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