在本例中，委托模型是一个正确的图(带有循环)，所以死锁的发生可能是使用特定的类关系和线程的结果。
In this case, the delegation model is a proper graph (with cycles), and so a deadlock can occur as a result of particular class relationships and thread usage.
由于在基本编辑模式下无法定义所需的可选输入条件，因此在该模式中绘制的大多数逆向连接都会导致模型死锁。
The required alternative input criteria cannot be defined in the basic editing mode, so most backward connections drawn in basic editing mode add a deadlock to the model.
需特别指出的是，当流程模型包含的可选分支和并行分支组合了循环时，模型中出现死锁的风险将非常高。
In particular, when process models contain alternative and parallel branches combined with cycles, the risk of having modeled a deadlock is very high.
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