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a.

美 [eɪ]
英 [eɪ]
A.
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n.
— see also
A-frame
,
A level
,
A-road
1.
[c][u]
英语字母表的第 1 个字母the first letter of the English alphabet
‘Apple’ begins with (an) A/‘A’.
apple 一词以字母 a 开头。
2.
[c][u]
A 音(C 大调音阶的第六级音)the 6th note in the scale of C major
3.
[c][u]
(学业成绩)第一等,优,甲the highest mark/grade that a student can get for a piece of work or course of study
She got (an) A in/for Biology.
她生物科成绩得 A。
He had straight A's(= nothing but A's) all through high school.
他读中学时成绩全部是 A。
4.
[u]
(表示两个或更多可能性中的)第一个used to represent the first of two or more possibilities
Shall we go for plan A or plan B?
我们采用第一方案还是第二方案?
5.
[u]
(代表一个假设的或不指名的人)甲used to represent a person, for example in an imagined situation or to hide their identity
Assume A knows B is guilty.
假定甲知道乙有罪。
IDM
For me a car is just a means of getting from A to B.
在我看来,汽车只不过是从一地到另一地的代步工具。
from A to B
从一地到另一地from one place to another
For me a car is just a means of getting from A to B.
在我看来,汽车只不过是从一地到另一地的代步工具。
He knew his subject from A to Z.
他通晓自己的学科。
from A to Z
从头到尾;彻底地;完全including everything there is to know about sth
He knew his subject from A to Z.
他通晓自己的学科。
symb.
1.
A 级公路,干线公路(英国公路代号,后接数字)used in Britain before a number to refer to a particular important road
the A34 to Newbury
通往纽伯里的 A34 号(干线)公路
2.
(除美国外,用于数字前表示标准纸张尺寸) A …号纸(尺寸)used (but not in the US) before numbers which show standard metric sizes of paper
a sheet of A4 paper(= 297×210mm)
一张 A4 号纸(= 297 × 210 毫米)
A3(= 420×297mm)
A3 号纸(= 420 × 297 毫米)
A5(= 210×148mm)
A5 号纸(= 210 × 148 毫米)
abbr.
1.
(书写形式)安,安培(电流单位)(in writing) amp(s)

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