/eɪ ||; e/noun [C,U] (
plural A's;a's /eɪz
||; ez/)
1 the first letter of the English alphabet 英语字母表的第一个字母: ‘Andy’ begins with (an) ‘A’. Andy以字母A开头。
2 the highest mark given for an exam or piece of work （考试或作品评分的）最高等级，优等，甲等: I got an ‘A’ for my essay. 我的文章得了甲等。
from A to B from one place to another 从一地到另一地:
All I need is a car that gets me from A to B. 我只需要一辆汽车把我从甲地送到乙地。