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。

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The third part: Designation and Realization of the system based on 3-tiered structure.

第三部分，系统三层结构的设计实现。

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In the end, the paper also analyzes the future of the Three-tiered structure for networking applications.

本文还对三层结构的应用前景进行了分析。

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Notable here was the set-up of a three-tiered structure for programs on agricultural commodities like wheat, corn and grain.

FORBES: Magazine Article

The tiered structure also prevents erosion and provides a habitat for insects, birds and butterflies, which act as natural predators, reducing the need for pesticides.

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Yet that three-tiered structure is one reason why FBR's Kevin Book thinks the next farm bill will not vary too radically from the present one.

FORBES: Magazine Article