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航班
笔记本
advance guards是advance guard的复数
advance guard
美
英
na.
【军】前卫
复数:
advance guards
英汉
英英
na.
1.
【军】前卫,先锋
n.
1.
a
small
group
of
people
,
especially
soldiers
,
that
is
sent
to
a
place
before
other
people
to
start
the
work
that
needs
to
be
done
there