Next, you must define an application class.

接下来，必须定义应用程序类。

youdao

It defines a few fields and provides an application class name.

它定义了几个字段并提供一个应用程序类名称。

youdao

You would replace DemoApp with the name of your application class.

您可以用自己的应用程序类的名称来替代 DemoApp。

youdao

That makes for millions who cannot email their doctor or submit an application for a job or take a class online.

VOA: standard.2010.01.05

So the aim of this class is to make common sense more common, especially in the real world application.

所以本课程的目标是让常识更平常，特别是应用到实际中。

哈佛公开课 - 幸福课课程节选

The second class is the most popular application of what I'm doing now.

第二类的问题是我现在所做的最常见的应用

耶鲁公开课 - 基础物理课程节选

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