正如我们提到的，失败事件不是为同步调用创建的，也不是为双向业务流程交互创建的。
As stated, failed events are not created for synchronous invocations nor for two-way business process interactions.
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.
这为业务分析师和工程师们提供了一种标准、直观、双向的环境来解决流程的运行时展示问题。
This enables a standard, straightforward, round-trip friendly environment for business analysts as well as engineers dealing with the runtime representation of a process.
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