调用组件是短时间运行的进程时，将对单向目标操作采用首选交互样式。
When the calling component is a short running process, the preferred interaction style is honored for one-way target operations.
您还可以创建用于异步调用的单向操作，但是现在，我们只创建简单的同步请求。
You can also create one-way operations that can be used with asynchronous invocations, but for now, we are only creating a simple synchronous request.
如果被调用的操作是单向的，则不存在fault或out末端，因为这两种末端只能存在于双向操作中(请参见图6)。
If the operation being invoked is one way, there's no fault or out terminals because these can only exist for two-way operations (see Figure 6).
如果被调用的操作是单向的，则不存在fault或out末端，因为这两种末端只能存在于双向操作中(请参见图6)。
If the operation being invoked is one way, there's no fault or out terminals because these can only exist for two-way operations (see Figure 6).
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