For both long and short running process use cases, there is no Primary Actor; they are always triggered by other use cases and don't directly involve any user interaction.
对于长时间运行和短时间运行的流程用例，并没有主要参与者；它们始终由其他用例触发，并不直接涉及任何用户交互。
The primary persona should drive the user interface design for every use case that involves the associated human actor.
主要角色应该为每个涉及相关人类参与者的用例推进用户界面设计。
Because use cases contain actor and goal information in real language, test cases for user acceptance can be written prior to the creation of tests for the other test phases.
因为用例包括参与者真实语言的目标信息，用户验收的测试用例可以在为其它测试阶段创建测试之前编写。
As the use cases begin to take shape, the requirements are discussed in terms of goals for the user or actor.
由于用例开始具体化，这些用户或者参与者的需求也按照目的进行讨论。
For the classifiers, I applied the stereotypes, and indicating they represent an actor, a controller class, or a user interface (UI) class, respectively.
对于分类器，我应用原型、和，它们分别表示参与者、控制器类或用户界面(UI)类。
The user role responsible for invoking the service is identified (an actor is associated with each state).
标识了负责调用服务的用户角色（参与者与每个状态相关联）。
Responsible for showing information to the user and interpreting the user's commands. The external actor might sometimes be another computer system rather than a human user.
负责向用户显示信息以及解释用户的命令。外部的用户有时可能是另外一个计算机系统而不是真正的人。
Responsible for showing information to the user and interpreting the user's commands. The external actor might sometimes be another computer system rather than a human user.
负责向用户显示信息以及解释用户的命令。外部的用户有时可能是另外一个计算机系统而不是真正的人。
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