A-a prefix indicating the highest standard of the item specified:  ◆ A-grade;  ◆ A-level;  ◆ A-list.
A-A− 
Noun
(plural A-'s)
- Academic grade issued by some institutions, which is inferior to an A and superior to a B+.
| 词汇 | A- | 
| 词根词缀 | Macquarie Wiktionary A-a prefix indicating the highest standard of the item specified:  ◆ A-grade;  ◆ A-level;  ◆ A-list. A-Noun(plural A-'s) 
 | 
| 随便看 | 
英语词根词缀词典收录了54763条英语词根词缀词条,基本涵盖了全部常用英语词汇的词根、词缀及词根记忆法解析,是记忆英语词汇的必备工具。