In previous columns, we have established a use case model in which actors represent external entities that interact with our system.
在前面的专栏文章中，我们构建了一个用例模型，参与者在其中表示与系统交互的外部实体。
2
Develop a model of the user interface flow, showing how a given actor from the business process will interact with the system during a typical "session".
开发一个用户界面流程模型，显示在典型“会话”期间来自业务流程的给定参与者如何与系统相交互。
3
The use case model also includes use case diagrams and activity diagrams that describe how users interact with the system.