Letter · Frequency #5
a
字母A
Letter and exact-case symbols
Spoken name: ay. Scientific symbols are case-sensitive.
the letter A
Letter name · 字母名称the 1st letter of the English alphabet
英文字母 A（第 1 个字母）
Source: BridgeDict Latin alphabet catalog
atto
SI prefix · 国际单位制词头the SI prefix atto, representing a factor of 10^-18
国际单位制词头 atto，表示 10^-18
Source: BIPM SI Brochure核心释义
the first letter of the English alphabet
- 1.
A牌；王牌(包括在纸牌游戏中)
Ace. (including in card games)
- 2.
拉丁字母 A/a 的名称。
The name of the Latin script letter A/a.
- 3.
西里尔字母 А/а 的名称。
The name of the Cyrillic script letter А/а.
- 4.
某些教育机构颁发的学业成绩等级,略优于A。
An academic grade issued by certain educational institutions. Slightly better than an A.
- 5.
高于A或A+的学业成绩,通常是最优等级
An academic grade, higher than A or A+. Where it is used, it is often the best class of result.
- 6.
绝对温度
absolute temperature
- 7.
用法In use
I saw a cat in the garden.
用法提示：a 表示泛指，用于单数可数名词前。
She wants to buy a new car.
用法提示：a 表示数量'一'或泛指任意一个。
He is a teacher at the local school.
用法提示：a 用于表示职业或身份，泛指。
a + singular countable noun
用于泛指单数可数名词。
I have a dog.
我有一只狗。
a + adjective + singular countable noun
She is a kind person.
她是一个善良的人。
a + noun + of + noun
相关词与表达Connections
搭配Collocations
- capital A
- 大写字母A
- Write your name with a capital A.用大写A写你的名字。
- blood type A
- A型血
- She has blood type A.她是A型血。
- A antigen
- A抗原
- The A antigen is found on red blood cells.A抗原存在于红细胞上。
习语与比喻表达Idioms & figurative uses
- from A to Z
- 从头到尾，完全地She knows the subject from A to Z.她对这门学科了如指掌。
学习提示Learner notes
记忆技巧Memory Tip
字母A像金字塔，是字母表第一个，寓意第一和开始。
语境与语域Context & Register
表示字母A，用于拼写、字母表等场合，语气中立。
发音与拼写Pronunciation & Spelling
All the listed words end in the /eɪ/ sound and rhyme with the noun 'a' (the letter name). Do not confuse with words ending in the letter 'a' but pronounced as /ə/ (e.g., umbrella, camera) or as /ɑː/ (e.g., spa, bra). Also, words like 'name' or 'make' have a consonant after the vowel and do not rhyme.
高价值词汇High-value vocabulary
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
用法优先级Usage priority
Collins 词频等级为 5，建议结合例句记忆，而不是只背中文释义。
Dictionary facts from AI_FALLBACK, ECDICT, WIKTIONARY, BridgeDict Latin alphabet catalog, BIPM SI Brochure.