User interaction: the user interaction layer is the main purpose of this article.
用户交互层：用户交互层是本文的主要目的。
The end-to-end XML architecture contains three layers - the data layer, the Universal Services layer, and the user interaction layer.
这个端到端x ML体系结构包含三层—数据层、Universal services层和用户交互层。
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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