调用活动仅调用另一个服务的操作。
An invoke activity simply calls an operation on another service.
代理流程包含一个接收活动，后面跟着一个调用活动，以及一个仅当该流程提供的操作是双向操作时才需要的应答活动。
The process contains a receive activity followed by an invoke activity, and a reply activity that is needed only if the operation offered by the process is a two-way operation.
补偿服务需要一个操作来还原调用活动的forward 服务所做的改变。
The compensation service needs to be an operation which reverses the changes done by the forward service of the Invoke activity.
补偿活动允许您调用活动的补偿操作或范围的补偿处理程序。
A compensate activity lets you invoke a compensation operation for an activity or a compensation handler for a scope.
如果首先调用Proceed操作，那么ProcessOrder调用活动将运行，然后运行Update活动。
If the Proceed operation is called first, then the ProcessOrder invoke activity will run, followed by the Update activity.
如果首先调用Proceed操作，那么ProcessOrder调用活动将运行，然后运行Update活动。
If the Proceed operation is called first, then the ProcessOrder invoke activity will run, followed by the Update activity.
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