User interaction: the user interaction layer allows a user to interact with an application (for example, visualizing information stored in the database).

用户交互层：用户交互层让用户可以与应用程序交互(例如，显示数据库中存储的信息)。

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User interaction: the user interaction layer allows a user to interact with an application (for example, visualizing information stored in the database).

用户交互层：用户交互层让用户可以与应用程序交互(例如，显示数据库中存储的信息)。

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