Unfortunately, D is not available if the upper branch executes.
不幸的是，在上面的那个分支执行时，D是不可用的。
The upper branch of the decision reuses Global Task 1, which Main Process also reuses.
decision的上面一条分支重用了GlobalTask1，后者也被MainProcess重用。
The upper branch of the decision reuses Global Task 1, which Main Process also reuses.
decision的上面一条分支重用了GlobalTask1，后者也被MainProcess重用。
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