This model is divided into time class, space class, event class and state class by using object-oriented technology.

利用面向对象技术将模型划分为时间对象类、空间对象类、事件对象类、状态对象类。

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Objects in CAI are united using object-oriented technology and data abstract, and two abstract objects-graph and function object are formed.

利用面向对象技术，通过数据抽象将CAI中不同的对象统一起来，形成两个抽象对象图形对象和功能对象。

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Using Object-oriented technology in modeling process will standardized users' thinking and description because it is a wide-accepted thinking way.

在建模中采用面向对象的思想，这种思想在所有的技术人员中已经是一个习惯的思维方式有利于规范用户的思维方式；

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