在此系列文章的第3部分中，我们向您介绍了服务组件体系结构(SCA)导入和导出，并侧重介绍了如何将它们用作集成sca模块的机制。

In Part 3 of this series, we introduced you to Service Component Architecture (SCA) imports and exports and focused on using them as a mechanism to integrate SCA modules.

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这一节只对其基础体系结构做一个简要的介绍。

This section only takes a brief look at the base architecture.

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有时也将其称为“SOA分层体系结构”，其中介绍了各个层次和概念(如业务流程、服务或服务组件)及其相互间的关系。

Sometimes referred to as "the SOA layered architecture", this model introduces layers and concepts such as business process, service, or service component, as well as the relationships between them.

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