在这种情况下，一个可以规范化，自动化的企事业人事管理系统就显得非常必要。

In such circumstances, one can standardize and automate the management of enterprises and personnel system it is very necessary.

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一个真正的关系型数据库管理系统，既在逻辑层考虑到完全规范化的数据库，又提供数据的物理存储，这些数据为了高性能而被调整。

A true relational DBMS would allow for a fully normalized database at the logical level, while providing physical storage of data that is tuned for high performance.

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简单介绍了空中交通流量管理和决策支持系统的特点，对一种四阶段规范化数据建模方法加以改进。

Features of air traffic management and decision support system are introduced. Then, an improved four-stage standardized modeling method is proposed.

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