中间层配合数据存取层中存储的步骤将所需结果显示给用户端(顾客)。
The middle layer coordinates with the stored procedures within the data access tier to present the clients (customers) with the required results.
确定了该子系统的主要功能，并设计了子系统的软件架构、业务逻辑层以及数据存取层。
The major functions of the subsystem are determined and the software frame, service logic layer and data access layer of the subsystem are designed.
这种实现(图3)增加了额外的一层——企业数据总线，它提供对包含于企业应用或是应用下属数据库中的企业数据的存取。
The implementation (Figure 3) adds additional layer - enterprise data bus, providing access to the enterprise data, contained in either enterprise applications or their subordinated databases.
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