过于细致的定义用例，在用例进入原型、设计和开发任务之前就定义每一件事情。
Putting too much detail into use cases, trying to define everything before entering into prototype, design, and development tasks.
避开对此进行过于细致深入的分析，我们试着给它一个概括性的定义。
Without going into complicated analysis, however, we will try to give a general definition.
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