该方案为切换呼叫提供了保留信道，降低了切换呼叫的阻塞概率。
The scheme provided reserved channel for handover call to reduce blocking probability of handoff call.
然后，它将替代缓冲加入至回应，其中保留委派，以针对后续要求呼叫。
Then, it adds a substitution buffer to the response, which retains the delegate to call on future requests.
但是，如果该程序呼叫其他程序，区域变数在受呼叫程序执行时将保留它们的值。
However, if that procedure calls other procedures, the local variables retain their values while the called procedures are running.
借由建立交易，您可执行一系列这种呼叫却仍能保留将其复原的能力。
By establishing a transaction, you can execute a series of such calls while retaining the ability to roll them back.
如果您覆写这个方法，请先呼叫基底实作以保留所需的功能。
If you override this method, call the base implementation first to preserve the desired functionality.
如果您覆写这个方法，请先呼叫基底实作以保留所需的功能。
If you override this method, call the base implementation first to preserve the desired functionality.
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