This database system is developed on the based of relation model, and has been developed with the Object Oriented (OO) method.

该数据库系统的开发工作是基于关系模型，并用面向对象的方法进行了扩展。

youdao

This database system is developed on the based of relation model, and has been developed with the Object Oriented (OO) method.

该数据库系统的开发工作是基于关系模型，并用面向对象的方法进行了扩展。

youdao