Later, when you're ready to refine the model, you can expand the detailed palette and specifically use a user or service task.

稍后，当您准备好完善模型时，您可以展开详细调色板并专门使用一个用户或服务任务。

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You learned the advantages of addressing the creation of a data instance (the model) first and addressing the creation of user interface controls (the view) only upon completing that task.

您看到了首先解决数据实例（模型）创建，然后作为补充在此基础上解决用户界面控件（视图）创建问题的好处。

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Based on this, a user has a conceptual model of this task that includes certain expectations, such as the ability to create a new letter, select a recipient, and send the letter.

基于这点，用户会对期望的工作流有一个概念模型，例如能够创建一封新的信件，能够选择收件人，能够发送邮件等。

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