应用程序编程模型：提供有关设计开发项目的结构的指南。
Application programming model: Provides guidelines on how the development will be structured.
要学习如何编写应用，你的下一步是构建本地开发环境，并开始一边编程一边探索，参见开发者指南。
To learn how to write a real application, your next step is to set up a local development environment and begin exploring with code. The Developer Guide shows you how.
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