positive: "12PM 是中午<br>记得我刚来美国的时候,有门课程12PM开始。当时我问教授怎么晚上那么晚了还上课。他笑着说12PM是中午。<br>其实,中国人中分不清楚12AM和12PM的大有人在。我相信很多人把12AM当成是中午,12PM当成晚上。就168肯定就有很多人分不清楚。<br>规则参看:钱多多选股大赛规则截止日期: 11/15/2009 12:00am EST.<br>报名截止。<br>所以我在规则里面,尽量不用12,都用11:59啥的。<br>Are noon and midnight 12 a.m. or 12 p.m.?<br>This is a tricky question. The answer is that the terms 12 a.m. and 12 p.m. are wrong and should not be used.<br>To illustrate this, consider that ""a.m"" and ""p.m."" are abbreviations for ""ante meridiem"" and ""post meridiem."" They mean ""before noon"" and ""after noon,"" respectively. Noon is neither before or after noon; it is simply noon. Therefore, neither the ""a.m."" nor ""p.m."" designation is correct. On the other hand, midnight is both 12 hours before noon and 12 hours after noon. Therefore, either 12 a.m. or 12 p.m. could work as a designation for midnight, but both would be ambiguous as to the date intended.<br>When a specific date is important, and when we can use a 24-hour clock, we prefer to designate that moment not"
negative: "提供大学英语四六级、专四专八、考研英语等考试资讯及备考策略。<br>4 人赞同了该文章<br><img><br>某天下午经过广场,<br>12:00AM是凌晨12点还是中午12点?<br>“中午12点”是“a.m”还是“p.m”?<br>▶主流的说法:<br>a.m.=ante meridiem,上午,午前;<br>p.m.=post meridiem,下午,午后。<br>午夜a.m.,凌晨一点1:00 a.m.,早上十一点11:00 a.m.,<br>正午12:00 p.m.,晚上十一点11:00 p.m.,12:00 a.m.一天结束。<br>▶也有人认为<br>12:00 a.m.中午十二点,<br>12:00 p.m.午夜十二点,<br>例如美国政府公文格式手册(U.S. Government Style Manual (2000), 29th Edition)的第12章第9节,""12 a.m. (noon); 12:15 p.m. (15 minutes past noon). 12 p.m. (midnight); 12:25 a.m. (25 minutes past midnight)”。<br>▶美国国家标准与技术研究所(National Institute of Standards and Technology,NIST)设立标准:<br>meridiem就是noon,中午,正午,没有之前和之后,<br>所以中午十二点应该表达为12:00 noon,<br>前后一分钟的时间分别是11:59 a.m.和12:01 p.m.;<br>而午夜十二点可以表达为12:00 midnight,前后一分钟的时间分别是11:59 p.m.和12:01 a.m.,这样就不会产生误解了。<br>一起来学习时间的正确表达:<br>1-30分<br>如果所表述的时间在半小时之内,可以用“分钟 + past + 小时”:<br>6:10 ten past six<br>4:20 twenty past four<br>10:25 twenty-five past ten<br>31-59分<br>如果所表述的时间在半小时之外,可以用“(相差的)分钟 + to + (下一)小时”:<br>10:35 twenty-five to eleven<br>5:50 ten to six<br>9:49 eleven to ten<br>正好30分钟<br>如果所表述的时间恰好为半小时,可以用“half + past + 小时”:<br>11:30 half past eleven<br>2:30 half past two<br>15/45分钟如果所表述的分钟和15有关,就有三种表达法:<br>15分钟又叫一刻钟:a quarter<br>9:15 nine fifteen;fifteen past nine;a quarter past nine<br>3:45 three forty-five;fifteen to four;a quarter to four<br><img><br>上午下午的时间<br>1. am:(是ante meridiem的缩写)通常出现在12小时制式时间中,指一天中的午前(12点之前),如9.00 a.m.表示早上9:00。<br>2. pm:(是post meridiem的缩写),指一天中的午后,如4.50 p.m.表示下午4:50,11.00 p.m.表示深夜11:00<br>thirteen past six a.m.<br>上午六点十三分<br>four o'clock p.m.<br>下午四点<br>补充说明<br>Midnight 0:00<br>Early hours 1:00-3:00<br>Early morning 5:00-7:00<br>Noon 12:00<br>Early afternoon 13:00-15:00<br>Late afternoon 15:00-17:00<br>Late evening 21:00-23:00<br>赞同 4<br>添加评论<br>分享"