AM and PM: What Do They Mean? - timeanddate. com What Do AM and PM Stand For? By Aparna Kher and Konstantin Bikos Some countries use the 12-hour clock format with “am” and “pm” labels What do these abbreviations mean? Is midnight am or pm?
「午前」的英文缩写是 am，还是 a. m. ？ - 知乎 am pm 用的时候一定要紧跟时间，不能机械地去替代morning和afternoon。 比如你可以说 7am，大家都知道是上午7点；同时相信你绝对不会说出'Good am '这样的话 。
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