ad
noun
æd
noun
1
an
advertisement
[非正式] 广告;
ˌeɪˈdiː◄
2
Anno Domini
Anno
Domini
used
to
show
that
a
date
is
a
particular
number
of
years
after
the
birth
of
Christ
公元;
the
first
century
AD
公元 1 世纪
54
AD
公元 54 年