D is a required input of Task 4.
D是Task 4必需的输入。
D must, however, bypass the join and enter Task 4 directly to avoid the deadlock.
不过，D必须绕过join，直接进入Task 4，以避免出现死锁。
Unfortunately, this solution makes reusing Task 4 in other process models more difficult.
不幸的是，这种解决方案使得在其他流程模型中重用Task 4变得更加困难了。
Unfortunately, this solution makes reusing Task 4 in other process models more difficult.
不幸的是，这种解决方案使得在其他流程模型中重用Task 4变得更加困难了。
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