Data mediators provide the glue layer between disparate data sources and a unified data access API used by the client application.
数据仲裁程序提供了不同数据源和客户应用程序所用的统一数据访问API之间的粘合层。
The data access layer can also act as an integration point to link with other systems, including being a client of other Web services.
数据访问层还可以作为连接其他系统的集成点，可以成为其他 Web 服务的客户端。
The access services layer extends backend programming model and APIs out to the client.
访问服务层可以将后端编程模型和API向外扩展到客户端。
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