thirty
number
ˈθɜːti
number
1
the
number
30
三十
2
the thirties the ’30s, the 1930s
also
又作
the
years
from
1930
to
1939
（二十世纪）三十年代
plural 复数
In
the
thirties,
air
travel
really
began
to
take
off.
在三十年代，乘飞机旅行迅速流行了起来。
the
early/mid/late
thirties
The
family
sold
the
house
in
the
early
thirties.
三十年代初期，这家人把房子卖了。
3
be in your thirties
to
be
aged
between
30
and
39
在三十多岁年纪
early/mid/late
thirties
She
must
be
in
her
early
thirties
by
now.
她现在肯定是三十岁出头。
4
in the thirties
if
the
temperature
is
in
the
thirties,
it
is
between
30
degrees
and
39
degrees
在三十多度
in
the
low/mid/high
thirties
a
hot
day,
with
temperatures
in
the
low
thirties
气温在三十一二度的一个热天
her
thirtieth
birthday
她的三十岁生日
I’m
planning
to
leave
on
the
thirtieth
(=the
30th
day
of
the
month)
.
我打算三十号走。