样例应用程序是一个微型博客应用程序的简单界面。
The sample application is a simple user interface for a microblogging application. This application allows you to
我们不再需要眯着眼睛或四处点击来寻找我们想要访问的功能。按钮就在这个简单的界面中，我们可以点击它。
We no longer have to squint or click around in search of the feature we're trying to access. The button is right there in that simple interface for us to tap.
软件结构应遵循可靠、简单、界面友好等原则。
The software structure should be under the principle of reliability, simpleness and friendly interface.
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