The beautiful thing about Scala is that it's both functional and object-oriented, so you can keep a traditional eye on class design, even while you learn to enjoy Scala's functional types.

Scala的优点是它兼具函数性和面向对象特性，因此，您可以在享受Scala的函数类型的同时，继续像以前一样关注类设计。

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I also had to modify the ApplicationController class so it knows about all of the new types of customizations each screen might need on the main ApplicationShell.

我同样需要修改ApplicationController类，以使得它知道主applicationshell中的屏幕所可能需要的所有新的定制化类型。

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Accurate cost data allowed the staff to ask-and answer-concrete questions about class size, cancellation policies, and the types of classes to offer.

精确的财务数据帮助人员了解该课程的精确信息，包括课程规模，注销政策和提供的课程类型。

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