传统软件开发人员通常构建应用程序中的一个模块，或典型的三层体系结构中的单个层的一部分。
Traditional software developers generally build either a module within an application or a portion of a single layer in typical three-tier architecture.
该方案采用操作系统层、中间层和应用程序层的三层结构。
The architecture has three layers which include operating system layer, middleware layer and application layer.
此模型分为三层结构，移动数据库层、数据转化层、应用程序层。
And this model is divided into three layers structure: mobile database, data conversion, applications.
三层C/S结构模型是一种先进的协同应用程序开发模型。
Midas, 3tier C/S architecture model is an advanced cooperative application model.
三层C/S结构模型是一种先进的协同应用程序开发模型。
Midas, 3tier C/S architecture model is an advanced cooperative application model.
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