In fact, in many ways a Rails application is just a way to perform manipulations on the data in a relational database management system (RDBMS) in a directed way.

实际上，在很多情形中Rails应用程序正是以一种受管理的方式对关系型数据库管理系统(RDBMS)中的数据执行操作的一个途径。

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For example, if you build an application to sell video tapes, you might expect a user to query for all the videos that have a certain keyword in the title and that were directed by a given person.

例如，如果构建一个用于销售录像带的应用程序，您可能预期用户会查询标题中包含某个关键字并且由某个导演执导的所有视频。

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Instead of Fielding arbitrary requests in an arbitrary order, an application becomes a unified, directed conversation with a user.

应用程序不再是应付以任意次序到达的任意请求，而是变成了与一个用户进行统一且直接的交谈。

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While doing this codelab, you are specifically granted authorization to attack the Jarlsberg application as directed.

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Refusing the Indian dental treatment application, Mrs Bagnall directed him to be released on the existing bail conditions.

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