Early in the project a use case model is made, containing a list of all actors (users or external systems) and use cases in the system, their names, and a brief description.
在项目的早期计划阶段，完成一个用例模型，它包含了所有角色的列表(用户或者外部系统)，以及系统中用例，它们的名字，以及一个简单的介绍。
"Model" is a simple and direct description for the internal mechanism and external relationship to some items or entities, and is a symbolic and logic assumption to relatively simple status.
“模式”是对某一事项或实体的内在机械设计与外部联系的直观和简洁的描述，是对相对简单状况所做的象征性合乎逻辑的设想。
"Model" is a simple and direct description for the internal mechanism and external relationship to some items or entities, and is a symbolic and logic assumption to relatively simple status.
“模式”是对某一事项或实体的内在机械设计与外部联系的直观和简洁的描述，是对相对简单状况所做的象征性合乎逻辑的设想。
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