You will encounter different categories of use cases in your project, so select a representative use case from each category early on and work on it.

你将在你的项目中碰到不同的用例种类，因此尽早地从每个种类中选出一个代表性的用例，用它进行工作。

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First, a test representative involved in use case creation should steer the team away from the common pitfalls of use case writing.

首先，包含在用例创建中的一个测试代表应该使团队远离用例编写的常见陷阱。

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This use case represents a Human Activity performed by a customer service representative who resolves issues of stock availability.

此用例代表由客户服务代表执行的人员活动，该代表将解决库存问题。

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This nonconformism teases a feature that would have allowed users to make use of all those extra tiles, customizing unique home screens that was representative of not only their own use, but of Microsoft's entire design aesthetic.

ENGADGET: Xbox 360 Dashboard update hands-on (fall 2012) Hands-on

So instead of more authority being transferred to local parties, the high representative increasingly made use of his discretionary powers and, among other things, ended up sacking more than 70 elected officials over the next few years.

ECONOMIST: From Bosnia, East Timor, and other fragile places

As scientific instruments go, they're highly imperfect: they ignore distinctions of meaning, their counts can be inaccurate, and they're not necessarily representative of the language that people use when they're kicking around political issues with their co-workers or at the breakfast table.

NPR: 'Talking Right': Why the Left Is Losing, Linguistically