最后，提出了一个三层的知识仓库体系结构模型。
At last, the author propose a three-tier model of knowledge warehouse architecture.
本网上购物系统采用三层体系结构。
The system of online shopping adopts three-layers system construction.
中间件作为三层体系结构的中间层，作用至关重要。
As a middle layer of three-layer structure, middleware is important.
三层体系结构理论和数据层的设计实现。
Theory of 3-tiered structure and design and realization of data tier.
三层体系结构理论和数据层的设计实现。
Theory of 3-tiered structure and design and realization of data tier.
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