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art. [非特指的]一[個],每一,同一,第一,字母A, A字形
來源 : pydict
a definition
a
metric
unit
of
length
equal
to
one
ten
billionth
of
a
meter
(or
0.0001
micron);
used
to
specify
wavelengths
of
electromagnetic
radiation
(biochemistry)
purine
base
found
in
DNA
and
RNA;
pairs
with
thymine
in
DNA
and
with
uracil
in
RNA
the
basic
unit
of
electric
current
adopted
under
the
Systeme
International
d'Unites
examples:
a
typical
household
circuit
carries
15
to
50
amps
the
1st
letter
of
the
Roman
alphabet
the
blood
group
whose
red
cells
carry
the
A
antigen
來源 : wordnet
來源 : Trending