The model manages the application logic and data behind a given UI.
模型管理指定ui背后的应用程序逻辑和数据。
The application UI is in English and Chinese, the application contents is in Chinese.
本软件界面语言为英文和中文，内容语言为中文。
The application UI and contents is in Chinese.
软件的界面和内容都是中文。
Note: The application UI and contents are in Chinese.
注意：程序的界面和内容都是中文。
Note: The application UI and contents are in Chinese.
注意：程序的界面和内容都是中文。
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