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。

youdao

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Global Task 1，后者也被Main Process重用。

youdao

The upper branch leads to a fork that causes Task 1 and Task 2 to execute in parallel.

上面的分支通向一个fork，后者可以使Task 1和Task 2并列执行。

youdao

Twenty-nine died on April 5 in an explosion at the Upper Big Branch mine in West Virginia, operated by the Massey Energy Company.

VOA: standard.2010.04.27

The Legislative Council is the upper branch of Tynwald and has 11 members.

BBC: Tynwald Chamber

Page was a member, identifying himself as a Northern Hammerskin, part of the group's upper Midwest branch.

CNN: Hate with a beat: White power music

Thirty-one workers were inside the Upper Big Branch mine when an explosion ripped through its walls on Monday afternoon.

WHITEHOUSE: President Obama on WV Mine Tragedy and Justice Stevens