a.m.

uk

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/ˌeɪˈem/us

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/ˌeɪˈem/ A1 adverb used when referring to a time between twelve o'clock at night and twelve o'clock in the middle of the day: The first election results are expected around 1 a.m. 第一轮的选举结果预计在凌晨1点钟左右揭晓。