它们是应用程序中用于全局对象的一种常见模式，如数据库连接和配置设置。
They are a common pattern used for global objects in an application, such as database connections and configuration Settings.
包含了必需的模块后，将设置全局变量来处理移动并保持输入模式。
After including the required modules, global variables are set up to process the motion and maintain the input mode.
在模式设置后，要确信全局变量中包含了屏幕的大小。
After setting the mode, we make sure the global variables know about the size of the screen.
在模式设置后，要确信全局变量中包含了屏幕的大小。
After setting the mode, we make sure the global variables know about the size of the screen.
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