我们将描述每个主要的TCF组件，说明它们的角色、功能和相关数据值。
We'll describe each of the major TCF components, explaining its role, function, and related data values.
所谓的事例就是产品中执行功能的描述，通常陈述于特性支持什么样的用户角色以及它能提供什么样商业价值的术语中。
A story is a description of functionality to be implemented in the product, often stated in terms of what user roles the feature supports and what business value it offers them.
角色定义：用文字描述系统功能，和系统所需的服务。
Actor definitions: a textual description of the requestors of services provided by your system, and services provided to your system.
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