它从浏览器接受请求，从业务逻辑层请求服务，生成表示并对浏览器做出响应。

It accepts the request from the browser, requests the service from the business logic layer, generates the presentation, and responds to the browser.

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最后而且同样重要的，门户已经证实了当不需要展示与他们相关联的表示层的服务时，要与一方系统和流程整合起来是困难的。

Last but not least, portals have proven difficult to integrate with the party systems and processes as they do not necessarily expose services associated to their presentation layer.

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此层表示并使用元数据，元数据对于将每个层与其邻近的服务层成功分离非常关键。

This layer represents and USES the metadata that is key to the successful decoupling of each layer from its neighboring service layer.

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