The entity-relationship model has gained acceptance in database design and is widely used in practice.

实质- 联系的模型已经得到数据库的接收设计并且广泛地被用于练习。

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The final ERD (entity relationship model diagram) and system datum dictionary are given through data sheets normalization during logic design and physical design.

在逻辑设计与物理设计过程中通过数据规范化后得出最终的ER模型图并给出系统数据字典。

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And then it has introduces the design of database in detail, and drawn entity relationship diagram.

然后对数据库的设计进行了详细的介绍，并绘制了实体关系图。

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