AM /ˈeˈɛm/ 縮寫
  ante meridiem, 上午
  AM /ˈeˌɛm/
  是,在午前
  AM
  調幅
  Am  The first person singular of the verb be, in the indicative mode, present tense. See Be.
     God said unto Moses, I am that am.   --Exod. iii. 14.
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  Am
       n 1: a radioactive transuranic metallic element; discovered by
            bombarding uranium with helium atoms [syn: americium,
            atomic number 95]
       2: a master's degree in arts and sciences [syn: Master of Arts,
           MA, Artium Magister]
       3: modulation of the amplitude of the (radio) carrier wave
          [syn: amplitude modulation]
  a.m.
       adj : before noon [syn: ante meridiem]
       adv : before noon; "let's meet at 11 A.M." [syn: ante meridiem]