缩写1：A.D.拉丁文：anno Domini释义：in the year of the Lord 耶稣纪年，公元例句：The United States Civil War began in AD 1861.缩写2：a.m.拉丁文：Ante Meridiem释义：before middday 上午，午前例句：We will meet the mayor at 10 a.m.缩写3：c., ca.拉丁文：circa释义：around, about, approximately 大约用法：用于日期中表示大概的数。例句：The antique clock is from c.1900.缩写4：Cap拉丁文：capitulus释义：chapter 章节用法：用于英国及其前殖民地的法律章节前。例句：Electronic Transactions Ordinance (Cap. 553).缩写5：cf.拉丁文：confer释义：brin
