应用程序之间、应用程序与系统服务之间以及系统服务之间都是通过Web服务进行通信。
Applications communicate with each other and with the system's services through web services, and the same holds for communication between system services.
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.
IBM i还有一个消息传递系统，程序使用该系统与用户和其他程序通信。
The IBM I also has a messaging system that programs use to communicate with users and other programs.
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