?am???pm??????????_????
...??am???? ante meridiem (before noon)? ?? ?0?00-12?00?? ??pm????post meridiem (=afternoon) ????12?01-24?00)? ???? ??????????12?????????????????????????????????? ?? ?????????????????????? ???? ......
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?????????am pm???????? - ??
...???????????????am??????????? ????????? pm?????????? 12 ???? AM = Ante meridiem : ???? PM = Post meridiem : ???? 12???24?????????? ... 12?????? ??12????12:00 noon ??12??? ......
https://www.zhihu.com/question/56680926
???AM??PM - ????
...???AM? 1?AM? ??? ante meridiem????????????????????????????????????????? 2?PM????post meridiem?????????????????????????????????????????????????? ????? 1???????? ......
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????am?pm????? - ??
...????am?pm????? ????????????? ?12:36am ?????????????????14:xxam ??2:xxam ?????30??12:30pm ?? ???? ??? 25...
https://www.zhihu.com/question/46494844
AM?PM?????_????
...AM??????PM?????? 1?AM?ante meridiem?????????12????????????????12?????0?00?00?11?59?59?? 2?PM????post meridiem????????????????????????????12?00?00?23?59?59??? ???? AM?PM??????????? ......
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AM PM?????_????
...AM????12????12???24???????0?00-12?00??PM????12????12???24???????12?00-24?00?? ??????????????????????????????????a.m.????ante meridiem???????? ???p.m.????post meridiem???????????? ......
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am,pm????? - ????
...am?pm?????????? 1?a.m.?p.m. 2?A.M.?P.M. 3?am?pm 4?AM?PM ?????????9.30a.m. ?9.30AM??????????????? am pm ????????????????????????????????????? ????? AM?ante meridiem?????????12?????????? ......
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???am,pm?????? - ????
...????????12????12????am???6:00am????????12????pm???6:00pm????????????????18:00?? ??????????????????NIST??????12?????12:00 noon??????????11:59 am?12:01 pm?...
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?????????? am??? a.m.? - ??
...????????? ?????????????????????????????????????? am/pm ????????????????????morning?afternoon? ?????? 7am?????????7?????????????'Good am.'???? ?...
https://www.zhihu.com/question/350903367
?????FM?AM?SW?MW?FM???????
...?????FM?AM?SW?MW????????????????AM????FM????MW???????SW?????????????? AM?????FM???????????????????????????AM???????????MW?????????????????????????? ......
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