The listings below show the application interfaces for the three services.
以下清单显示了三个服务的应用程序接口。
Where can be 1, 2, or 3, depending on which of the three services you want to invoke.
其中可以是1、2或3,这取决于这三个服务中的哪一个是您希望调用的。
You're also informed that the three services are to be completed in a single unit of work, and need to all succeed or, if not, to roll back.
另外还要求在单个工作单元内完成这三个服务程序,并且要求所有操作都能成功执行,否则要求回滚。
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