A scenario is an instance of the use case.
一个场景是用例的一个实例。
Whereas use cases capture a generalized view of a user and a task, scenarios describe a specific instance of a use case in terms of a concrete workflow.
尽管用例获取用户和任务的一般化观点，但是依据具体的工作流，情境描述具体的用例实例。
The second use case involves caching data which is only relevant for one portlet instance, and the data is specific to a portlet window.
第二个用例涉及到了只与某个Portlet实例有关的缓存数据，并且数据是特定于 Portlet 窗口的。
If you do use-case driven development, a usage scenario is typically an instance of a complete use case scenario, or a portion of the use case scenario.
如果你确实执行了用例驱动式开发，那么使用场景就是一个典型的完整用例情景的实例，或者用例情景的一部分。
For instance, you can use the findCustomerByName method to search for a customer by the last name to implement general-purpose uses case scenarios.
比如说，可以使用findCustomerByName方法通过客户的姓氏来搜索客户，从而实现一般用途的用例场景。
In this case, you create a color instance and use it to set a particular pixel within the display window (see Listing 2 and Figure 3, cell b).
在本例中，我们创建了一个颜色实例并用它来设置显示窗口内的某个像素点(参见清单2和图3中的cellb)。
It would be tempting in this case to re-use the IDs teoma and yahoo later in the switch/case/toggle mechanism, but that will not work because those names refer to the instance data.
在本例后面的switch/case/toggle机制中重用teoma和yahoo这两个ID会是个不小的诱惑，但是由于它们的名称都引用了实例数据所以并不能正常运行。
According to an instance, several key issues of building use case model have been analyzed and discussed.
并结合实例，重点分析讨论了建立用例模型的几个关键性问题。
According to an instance, several key issues of building use case model have been analyzed and discussed.
并结合实例，重点分析讨论了建立用例模型的几个关键性问题。
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