A, a

劍橋詞典

A, a noun (LETTER)

[ 可數(shù)名詞：有復(fù)數(shù)形式的名詞 or 不可數(shù)或單數(shù)名詞：沒有復(fù)數(shù)形式的名詞 ]
the first letter of the English alphabet
（英語字母表的第一個(gè)字母）

A, a noun (MUSIC)

[ 可數(shù)名詞：有復(fù)數(shù)形式的名詞 or 不可數(shù)或單數(shù)名詞：沒有復(fù)數(shù)形式的名詞 ]
a note in Western music
A音
This concerto is in the key of A major . 這支協(xié)奏曲是 A 大調(diào)。

A, a noun (MARK)

[ 可數(shù)名詞：有復(fù)數(shù)形式的名詞 or 不可數(shù)或單數(shù)名詞：沒有復(fù)數(shù)形式的名詞 ]
a mark in an exam or for a piece of work that shows that your work is considered excellent
（學(xué)業(yè)成績）A，優(yōu)，甲
Sophie got an A for English . 蘇菲英語得了個(gè) A。
She got straight As (= all her marks were As) in her final exams . 她期末考試各科成績均為 A。
Jim is a straight -A student (= all his marks are A). 吉姆是個(gè)全優(yōu)生。


習(xí)語

from A to B
from A to Z 返回 A, a