收集一份良好、长的字段清单，然后继续下一阶段，概念模式，在其中定义系统的概念。
Collect a good, long list of the fields, and then proceed to the next phase, the conceptual schema, in which you define the concepts of the system.
对模型进行定义是概念阶段和实现阶段之间的必要中间步骤。
Defining this model is the necessary intermediary step between the concept stage and implementation stage.
在最初的需求定义阶段，我们可以随意地将注意力集中在“绘图点”，这样让我们能够顺利地探索各种可能的设计概念。
In the initial requirements definition phase we are free to focus only on the "plot points," allowing us to be fluid as we explore design concepts.
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