对于资源和资源集合，help函数提供了项的简短摘要以及可用的属性和方法。

For a resource or resource collection, the help function provides a brief summary of the item as well as the available attributes and methods.

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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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创建了特定类型的集合后，确保仅使用针对该类型定义的方法和属性。

Once you have created a collection of a specific type, be sure you use only the methods and properties defined on that type.

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