OperatingSystem.ear: a sample stateful operating system service.
一个有状态操作系统服务的范例。
CalculatorService.ear: a sample stateful operating system service.
ear：有状态操作系统服务范例。
A less obvious but ubiquitous mass produced service is a computer operating system.
一个比较不明显的但是无处不在的大规模生产的服务是计算机操作系统。
Operating system, Service Packs, and Applications or custom made information.
作业系统，服务包，以及应用程序或定制的信息。
Operating system, Service Packs, and Applications or custom made information.
作业系统，服务包，以及应用程序或定制的信息。
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