These are tools that the oo designer puts to use in order to structure the analysis, the design, and the implementation, but they aren't central to what makes an oo program object-oriented.

这些是OO设计人员用来构成分析、设计和实现的工具，但它们并不是使程序面向对象的主要部分。

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In object-oriented programming, a message is the way that one program object requests an action from another object.

在面向对象编程中，消息是一个程序对象要求另一个对象完成一个动作的方法。

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EPOM (extended program object model) is an abstract model used to characterize advanced language program. We can distill all kinds of information of program using EPOM.

可扩展程序对象模型是一种用来刻画高级语言程序的抽象模型，利用该模型可以很方便地抽取出程序中各式各样的信息。

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"No Earth impact is possible, " according to Don Yeomans, manager of the Near-Earth Object Program Office at NASA's Jet Propulsion Laboratory.

CNN: Russian meteor shower causes blast; hundreds injured

"The meteor was probably about the size of an SUV, " said Donald Yeomans, manager of NASA's Near-Earth Object Program Office at the laboratory, in Pasadena, Calif.

WSJ: Meteor Creates a Show, No Apparent Damage

"We would expect an event of this magnitude to occur once every 100 years, " said Paul Chodas of NASA's Near-Earth Object Program Office, in a statement.

WSJ: Russia Meteor Was Largest in More Than a Century