图2显示了两个系统、贷款提交和商业资信咨询机构系统以及我们将在这个专栏的余下部分着重讨论的交互。
Figure 2 shows the two systems, the loan submission and the credit bureau system, and the interactions we'll focus on for the remainder of this column.
视图。视图负责应用程序的数据显示以及向用户提供控制选项，使用户可以与系统进行进一步交互。
The view is responsible for displaying the application data and presenting the control that allows the users to further interact with the system.
用例模型应该将系统放到上下文环境中，显示系统和外部参与者之间的边界，并描述系统和参与者之间的关键交互。
The use case model should place the system in context, showing the boundaries of the system and the external actors as well as describing the key interactions between the system and the actors.
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