事实上，很多人都使用过其对象模型创建过极为复杂、设计良好的面向对象软件。

In fact, many have used its object model to create surprisingly sophisticated, well-designed, object-oriented software.

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建立了合理的数据结构及适当的类等级，从而完成了整个软件系统的面向对象分析和设计模型。

And then, data structure and classes grade were built up, the objects and the model of the software system were completed.

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因此，我们利用UML和形式化方法来设计面向方面程序，并建立相应的面向方面软件设计模型来设计实时系统。

So we express the AOP using UML and formal methods, and establish the Aspect-Oriented Software Design Model correspondingly to model real-time systems.

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