The primary objective of UXD is to identify what will make the application most useful for the intended customer base and including that knowledge as part of the design.

UXD的主要目的是，确定哪些特性会让应用程序对于目标客户最有价值，并在设计中融入这些知识。

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We'll start by building the survey application, including providing the base class and extending the class with the question specific elements.

您将从构建问卷调查应用程序开始，包括提供基类以及使用问题特定的元素来扩展这个类。

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The base package including point class, line class, area class, volume class, complex object class and relation class, is the base of the application package and the combination package.

其中基础类包是应用类包和组合类包的基础，它用点、线、面、体、复杂对象和关系类等基本的要素表示三维空间。

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