在前面的专栏文章中，我们构建了一个用例模型，参与者在其中表示与系统交互的外部实体。

In previous columns, we have established a use case model in which actors represent external entities that interact with our system.

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在前面关联曾被用在通讯中来把模型拥有的每个类映射到一个关联计划。

The relation has been used previously in a correspondence to map each class owned by a model to a table owned by a relational schema.

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冲在前线的是福克斯新闻台的新秀格伦·贝克（Glenn Beck）。 他用一张地图，一个塑料武装直升飞机模型和几个玩具坦克陈述了作战计划。

First to the front was Fox News' latest star, Glenn Beck, who laid out the battle plan with a map, a couple of toy tanks and a plastic attack helicopter.

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In one model we thought of the firms setting quantities and the market determining prices, and here we have the firms setting prices and the market determining quantities, but the basic underlying economic structure of this is very, very similar.

在前一个模型我们假设公司设定产量,而市场决定价格,在本模型中我们假设公司设定价格,而市场决定产量,但基本的经济结构是非常,非常相似的

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