In some cases, the business object model evolved into system classes.

在某些情况下，业务对象模型将演化成系统类。

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Then an object model and sequence diagrams were created for each system.

然后为每个系统创建对象模型和序列图。

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At last UML was used to build an object-oriented model of a version management system.

最后使用UML建立了一个版本管理系统的面向对象模型。

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At last UML was used to build an object-oriented model of a version management system.

最后使用UML建立了一个版本管理系统的面向对象模型。

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