The component belongs to middle layer of 3-tiered architecture, which separates user interface layer and database system, with clear logic and powerful reusable features.
组件在三层体系构架中处于中间层，隔离了用户界面层和数据库系统，逻辑清晰，可重用性强。
The component belongs to middle layer of 3-tiered architecture, which separates user interface layer and database system, with clear logic and powerful reusable features.
组件在三层体系构架中处于中间层，隔离了用户界面层和数据库系统，逻辑清晰，可重用性强。
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