D
plural noun
diː
plural noun
1
the
fourth
letter
of
the
English
alphabet
英语字母表的第四个字母
C,U
2
the
second
note
in
the
musical
scale
of
C
major
or
the
musical
key
based
on
this
note
D音〔C 大调音阶中的第二音〕; D 调
C,U
3
a
mark
given
to
a
student’s
work
to
show
that
it
is
not
very
good
D级，丁级，丁等〔表示学习成绩不太好〕
C
I
got
a
D
in
history
last
semester.
上个学期我历史得了个 D。
4
the
number
500
in
the
system
of
roman
numerals
〔罗马数字〕500