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1·Technically speaking, the requirements types are texts that represent the planning strategy in the application (Demand Management, Sales and Distribution).

从技术上讲，需求类型就是表示计划策略在(需求管理、销售与分销)应用中的一种文本。

2·Concurrent enterprises production planning and control system can't meet the requirements of virtual enterprises environment, such as autonomy, distribution, dynamics and heterogeneity.

现有的企业生产计划与控制系统已不能满足虚拟企业环境下的需求，如自治性、分布性、动态性与异构性。

3·Good environmental planning, comprehensive planning, rational distribution, a clear residential areas, industrial areas, mixed in different functional areas such as the scope and requirements laid.

做好环境规划，全面规划、合理布局，明确住宅区、工业区、混合区等不同功能区的范围和布设要求。