在考察设计模式和集合时您会发现，除了主题之外，设计模式还可以由更小的集合组成。

As you explore design patterns and collections, you'll find that, in addition to topics, a design pattern can aggregate smaller collections.

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比如，可以分别为how - to集合、案例研究集合和参考设置集合创建设计模式。

For instance, you can create design patterns for a how-to collection, a case study collection, and a reference set collection.

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功能模块模型抽象出可穿戴计算机模块的共性——属性集合和关系集合，给出一般化的设计原则和方法。

The function modules model abstract the common properties of wearable computer hardware modules - properties set and relationships set, providing the general design principles and method.

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