这里提到的层是分布式的SOA程序架构层与企业系统和过程层。
The layers here are both distributed SOA application architecture layers and enterprise system and process layers.
在多层架构的分布式软件系统中，如何在层间交换数据，采用何种粒度的对象交换数据，是系统构建时经常遇到的问题。
It is a common problem for the designer to exchange data in different layers and use which kind of granularity in multi-layers architecture software system.
在多层架构的分布式软件系统中，如何在层间交换数据，采用何种粒度的对象交换数据，是系统构建时经常遇到的问题。
It is a common problem for the designer to exchange data in different layers and use which kind of granularity in multi-layers architecture software system.
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