1、英语a.m和p.m都是英语中的
拉丁语。
2、Am
ante
meridiem表示正午前.0:00~12:00。
3、Pm
post
meridiem表示正午后
12：00～24：00。
拓展资料
a.m
1.
His
workday
starts
at
3.30
a.m.
and
lasts
12
hours.
他凌晨3点半开始工作，一直持续12小时。
2.
A.
M.
Babu
is
a
commentator
on
African
affairs.
A.
M.
巴布是一位非洲事务评论员。
3.
Eve,
squinting
at
the
clock,
saw
it
was
just
on
7
a.m.
伊夫眯着眼瞥了一下钟，看到差不多是早上7点钟。
4.
The
Visitor
Centre
is
open
daily
8.30
a.m.
–
4.30
p.m.
游客中心每日上午8：30至下午4：30开放。
5.
Everyone
had
already
assembled
in
the
boardroom
for
the
9:00
a.m.
session.
所有人都已集中到了董事会会议室，准备参加上午9点钟的会议。
6.
The
program
starts
at
9
a.m.
节目上午9点开始。
7.
The
clock
had
stopped
at
2.12
a.m.
钟在凌晨2点12分时停了。
8.
Sometimes
I'd
even
call
up
at
4
a.m.
有时我甚至早上四点都打电话。
p.m
1.
At
approxi-mately
11:30
p.m.,
Pollard
finally
gave
his
consent
to
the
search.
大概晚上11点半的时候，波拉德最终同意进行搜查。
2.
At
about
4.30
p.m.
Audrey
arrived
at
the
office.
大约下午4点30分，奥德丽到了办公室。
3.
By
Friday
at
5:30
p.m.,
I
still
hadn't
heard
from
Lund.
直到周五下午5点半，我仍未收到伦德的消息。
4.
The
Visitor
Centre
is
open
daily
8.30
a.m.
–
4.30
p.m.
游客中心每日上午8：30至下午4：30开放。
5.
At
six
p.m.
large
groups
poured
from
the
numerous
offices.
下午6点钟大群大群的人从无数办公楼里蜂拥而出。
6.
The
meeting
began
at
precisely
4.00
p.m.
会议于下午4点整开始。