In the biological class, has studied the living system material circulation.
生物课上，学了生物系统的物质循环。
So material management information system mast register the whole process of material circulation.
因此物资管理信息系统需要记录物资流通的全过程。
So material management information system mast register the whole process of material circulation.
因此物资管理信息系统需要记录物资流通的全过程。
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