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。 |
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。 |
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。 |
He knew his subject from A to Z. 他通晓自己的学科。 |
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） |
