| 单词 | A | 
| 释义 |  noun |  AA1, a /eɪ/ noun (plural A’s, a’s) 1[countable] a)the first letter of the English alphabet b)a sound represented by this letter2[countable] the best grade that a student can get in a class or on a test:  an A on the test He got straight A’s  (=all A grades) in high school.3eng. lang. arts a)[countable, uncountable] the sixth note in the musical scale of C major b)[uncountable] the musical key based on this note4an A student someone who regularly gets the best grades possible for his or her work in school or college5from A to B used to talk about getting from one place to another in the easiest or most basic way:  I just need a car to get me from A to B.6(from) A to Z describing, including, or knowing everything about a subject:  The book is an A to Z of French cooking.7[uncountable] a common type of blood  noun |  AA2  the written abbreviation of amp | 
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