此概念在业务用例实现中获得。
This concept is captured in the Business Use Case Realizations.
在这种情况下，业务用例实现也可以视为场景的定义。
In this context, the business use case realization can also be considered the definition of a Scenario.
域模型很有用，即使你不提出业务用例实现。
The domain model is useful, even if you do not produce business use case realizations.
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