加拿大华人论坛 加拿大生活信息关于AM/PM
在加拿大
说来惭愧，总是对AM和PM到底哪个是上午那个是下午出现大脑暂时缺氧状态，要想想才行，所以去查到他们的缩写，别说，以前还真不知道这几个词，所以贴在这里，便于以后查询，呵呵“AM” stands for the Latin phrase Ante Meridiem which means “before noon”and “PM” stands for Post Meridiem : “after noon.” Although digital clocks routinely label noon “12:00 PM” you should avoid this expression not only because it is incorrect, but because many people will imagine you are talking about midnight instead. The same goes for “12:00 AM.” You can say or write “twelve noon,” “noon sharp,” or “exactly at noon” when you want to designate a precise time. It is now rare to see periods placed after these abbreviations: “A.M.”; but in the US, in formal writing it is still preferable to capitalize them, though the lower-case “am” and “pm” are now so popular they are not likely to get you into trouble. The lower-case forms are standard usage in the UK. Occasionally computer programs encourage you to write “AM” and “PM” without a space before them, but others will misread your data if you omit the space. The nonstandard habit of omitting the space is spreading rapidly, and should be avoided in formal writing.
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