举例来说，设想有一个旅行预定流程。

For example, imagine a travel reservation process.

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让我们看一下包含如下服务的旅行预定流程。

Let us look at a travel booking process that consists, for example, of the following services.

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在旅行预定流程中，需要定义如下forward服务和补偿服务。

In the travel booking process, the following forward and compensation services could be defined.

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