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a

美 [ə]英 [ə]

art.一;任何一;每一

牛津词典

indefinite article

（用于可数名词或单数名词前，表示未曾提到的）一（人、事、物）
used before countable or singular nouns referring to people or things that have not already been mentioned

a man/horse/unit

一个人；一匹马；一个单位

an aunt/egg/hour/x-ray

一个姑母；一个鸡蛋；一小时；一张X光片

I can only carry two at a time.

我一次只能带两个。

There's a visitor for you.

有位客人找你。

She's a friend of my father's (= one of my father's friends) .

她是我父亲的一位朋友。

（用于前有形容词或后有短语的不可数名词前）
used before uncountable nouns when these have an adjective in front of them, or phrase following them

a good knowledge of French

精通法语

a sadness that won't go away

挥之不去的悲愁

任何一；每一
any; every

A lion is a dangerous animal.

狮子是猛兽。

（表示为某一群体或职业中的一员）
used to show that sb/sth is a member of a group or profession

Their new car's a BMW.

他们的新轿车是辆宝马。

She's a Buddhist.

她是个佛教徒。

He's a teacher.

他是教师。

Is that a Monet (= a painting by Monet) ?

那是莫奈的画吗？

（用于视为一体的两个名词之前）
used in front of two nouns that are seen as a single unit

a knife and fork

一副刀叉

（用于某些数字前，代替one）
used instead of one before some numbers

A thousand people were there.

那里有一千人。

（用于价格、数量、比率等）一，每一
used when talking about prices, quantities and rates

They cost 50p a kilo.

其价钱是一公斤50便士。

I can type 50 words a minute.

我每分钟能打50个单词。

He was driving at 50 miles an hour.

当时他正以每小时50英里的速度驾车。

像（某人）的人；…式的人物
a person like sb

She's a little Hitler.

她是个小希特勒。

（用于某人姓名前，表示说话者不认识此人）有个
used before sb's name to show that the speaker does not know the person

There's a Mrs Green to see you.

有位格林太太要见你。

（用于一星期中某天的名称前，表示具体某一天）
used before the names of days of the week to talk about one particular day

She died on a Tuesday.

她是在一个星期二去世的。

柯林斯词典

a

频次

A or an is the indefinite article. It is used at the beginning of noun groups which refer to only one person or thing. The form an is used in front of words that begin with vowel sounds.

a 或 an 为不定冠词，用于表示单个事物或人的名词词组之前。an 用于以元音开始的单词之前。
2
DET （指初次提及或非特指的人或物）一（个）
You use a or an when you are referring to someone or something for the first time or when people may not know which particular person or thing you are talking about.

A waiter entered with a tray...

侍者端着托盘进来了。
3
DET （一类人或事物中非特指的）任何一（个）
You use a or an when you are referring to any person or thing of a particular type and do not want to be specific.

...expensive make-up that we saw being advertised by a beautiful model...

我们所见的由一位漂亮模特代言的昂贵化妆品
4
DET （用于前加形容词或后加修饰语的不可数名词之前）一（种）
You use a or an in front of an uncount noun when that noun follows an adjective, or when the noun is followed by words that describe it more fully.

There was a terrible sadness in her eyes...

她眼神中流露出深深的悲伤。
5
DET （用于物质名词前）一（类），一（种）
You use a or an in front of a mass noun when you want to refer to a single type or make of something.

Bollinger 'RD' is a rare, highly prized wine.

博林格RD香槟是一种名贵的备受推崇的葡萄酒。
6
DET （用于表示数量的词组中）许多/少许/一点
You use a in quantifiers such as a lot ,a little, and a bit.

I spend a lot on expensive jewelry and clothing...

我花很多钱购买昂贵的首饰和衣服。
7
DET （一类人或事物中典型的）一（个）
You use a or an to refer to someone or something as a typical member of a group, class, or type.

Some parents believe a boy must learn to stand up and fight like a man.

有些父母认为男孩子必须学会像男子汉一样顶天立地，勇于抗争。
8
DET （用于日子、月份或节日的名称之前以表示特例）一个
You use a or an in front of the names of days, months, or festivals when you are referring to one particular instance of that day, month, or festival.

The interview took place on a Friday afternoon...

采访是在一个星期五的下午进行的。
9
DET （从事某一职业的）一（位），一（名）
You use a or an when you are saying what someone is or what job they have.

I explained that I was an artist...

我解释说自己是个艺术家。
10
DET （用于不为说话人所知的首次提到的人名前）某一（个）
You use a or an in front of the names of people as a way of indicating that you do not know them or anything about them and you are saying their name for the first time.

The full address on a stick-on label was that of a Mrs P. R. Slater of Peterborough...

不干胶标签上的完整地址写的是彼得伯勒的一位P. R. 斯莱特太太。
11
DET （用于人名前，表示与该人有相同特性或品质）类似…的一个（或一位）
You use a or an in front of the names of people when you want to refer to someone else who has the same qualities or character as the person named.

When I listen to her play I can hear a new Nigel Kennedy.

从她的演奏中我听出了新一代的奈杰尔·肯尼迪。
12
DET （用于姓氏前，表示某人属于某姓氏家族）一位姓…的人
You use a or an in front of a surname when you want to refer to someone who belongs to the family with that surname.

As far as I can recall, Patti was a Smith.

我记得帕蒂是姓史密斯的。
13
DET （用于艺术家名字前）一幅…的画，一件…的雕塑作品
You use a or an in front of the names of artists to refer to one individual painting or sculpture created by them.

Most people have very little difficulty in seeing why a Van Gogh is a work of genius.

多数人不难理解为什么凡·高的作品是天才之作。
14
DET （代替数字one使用，尤用于hundred，hour和metre等表示度量的单词之前以及half, quarter和third等分数之前）
You use a or an instead of the number 'one', especially with words of measurement such as 'hundred', 'hour', and 'metre', and with fractions such as 'half', 'quarter', and 'third'.

...more than a thousand acres of land.

1,000多英亩地
15
DET （用于表示比率的短语中）每一
You use a or an in expressions such as eight hours a day to express a rate or ratio.

Prices start at £13.95 a metre for printed cotton...

印花棉布以每米13.95英镑的价格起售。

英英释义

noun

the 1st letter of the Roman alphabet: Synonym: A

数据来源：WordNet

双语例句

1

I think we could all use a drink after that !

我想我们在事情办完之后都得痛快地喝一杯。
2

I 'd like to learn a new language .

我想学习一门新的语言。
3

She was invited to give a paper on the results of her research .

她应邀发表一篇论文，报告她的研究结果。
4

He 's trying to get a job in a bank .

他正设法在银行找一个工作。
5

I 'll have a think and let you know tomorrow .

我要好好想一想，明天告诉你。
6

It set off a chain reaction in the international money markets .

这一事件在国际金融市场上引起了连锁反应。
7

He 's the president of a large international organization .

他是一个大型国际组织的主席。
8

He is a very good man .

他是个非常高尚的人。
9

He 's a natural for the role .

他是这个角色的最佳人选。
10

What is she like as a person ?

她的人品怎么样？
11

She had to push herself forward to get a promotion .

她必须努力表现自己以求得升迁机会。
12

She has a very narrow view of the world .

她对世界的认识是非常狭隘的。
13

I thought it was a very bad article .

我以为那是一篇很低劣的文章。
14

She first made her name as a writer of children 's books .

她最初是以儿童读物作家成名的。
15

She is a busy woman with many calls on her time .

她是个大忙人，有很多事等着她去办。
16

She 's had a hard life .

她一生艰苦。
17

She has two children by a previous marriage .

她和前夫有两个孩子。
18

She is still hunting for a new job .

她还在找新工作。
19

She 's reading for a law degree .

她在攻读法学学位。
20

He had a new car and a boat .

他有一辆新车和一条船。
21

He 's been ill a long time .

他生病很久了。
22

She 's going through a difficult phase .

她正处于困难时期。
23

He 's had a really rough time recently .

他最近真是困难重重。
24

He 's talking in terms of starting a completely new career .

他正在谈论开创全新的事业。
25

He was a weak little mouse of a man .

他是个懦弱无能的人。
26

She always has her head in a book .

她总是埋头读书。
27

He does a lot of weight training .

他进行大量的举重训练。
28

There 's a bus stop in front of the house .

房子前面有一个公共汽车站。
29

He has a half share in the company .

他拥有该公司的一半股份。
30

English is a compulsory subject at this level .

英语在这一级别是必修科目。

同义词辨析

a (an) one 【导航词义：一个】

a (an) v. 一个

〔辨析〕

通常用于单数可数名词之前，泛指某类人或事物中的一个。

〔例证〕

My friend needs a bilingual dictionary.

我的朋友需要一本双语词典。

Would you like a sandwich?

要来份三明治吗？

There is a bird sitting in the tree.

树上卧着一只鸟。

one v. 一，一个

〔辨析〕

强调数量的概念，说明是一个而不是两个或三个。

〔例证〕

One million means a lot to me.

一百万对我来说是个大数目。

Plant one tree per hour.

每小时种一棵树。

词语用例

习语

同反义词

同义词

art.

an one

a

牛津词典

柯林斯词典

a

2
DET （指初次提及或非特指的人或物）一（个）
You use a or an when you are referring to someone or something for the first time or when people may not know which particular person or thing you are talking about.

3
DET （一类人或事物中非特指的）任何一（个）
You use a or an when you are referring to any person or thing of a particular type and do not want to be specific.

4
DET （用于前加形容词或后加修饰语的不可数名词之前）一（种）
You use a or an in front of an uncount noun when that noun follows an adjective, or when the noun is followed by words that describe it more fully.

5
DET （用于物质名词前）一（类），一（种）
You use a or an in front of a mass noun when you want to refer to a single type or make of something.

6
DET （用于表示数量的词组中）许多/少许/一点
You use a in quantifiers such as a lot ,a little, and a bit.

7
DET （一类人或事物中典型的）一（个）
You use a or an to refer to someone or something as a typical member of a group, class, or type.

8
DET （用于日子、月份或节日的名称之前以表示特例）一个
You use a or an in front of the names of days, months, or festivals when you are referring to one particular instance of that day, month, or festival.

9
DET （从事某一职业的）一（位），一（名）
You use a or an when you are saying what someone is or what job they have.

10
DET （用于不为说话人所知的首次提到的人名前）某一（个）
You use a or an in front of the names of people as a way of indicating that you do not know them or anything about them and you are saying their name for the first time.

11
DET （用于人名前，表示与该人有相同特性或品质）类似…的一个（或一位）
You use a or an in front of the names of people when you want to refer to someone else who has the same qualities or character as the person named.

12
DET （用于姓氏前，表示某人属于某姓氏家族）一位姓…的人
You use a or an in front of a surname when you want to refer to someone who belongs to the family with that surname.

13
DET （用于艺术家名字前）一幅…的画，一件…的雕塑作品
You use a or an in front of the names of artists to refer to one individual painting or sculpture created by them.

15
DET （用于表示比率的短语中）每一
You use a or an in expressions such as eight hours a day to express a rate or ratio.

英英释义

双语例句

同义词辨析

词语用例

同反义词

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大家在看

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a

牛津词典

柯林斯词典

a

2 DET （指初次提及或非特指的人或物）一（个） You use a or an when you are referring to someone or something for the first time or when people may not know which particular person or thing you are talking about.

3 DET （一类人或事物中非特指的）任何一（个） You use a or an when you are referring to any person or thing of a particular type and do not want to be specific.

4 DET （用于前加形容词或后加修饰语的不可数名词之前）一（种） You use a or an in front of an uncount noun when that noun follows an adjective, or when the noun is followed by words that describe it more fully.

5 DET （用于物质名词前）一（类），一（种） You use a or an in front of a mass noun when you want to refer to a single type or make of something.

6 DET （用于表示数量的词组中）许多/少许/一点 You use a in quantifiers such as a lot ,a little, and a bit.

7 DET （一类人或事物中典型的）一（个） You use a or an to refer to someone or something as a typical member of a group, class, or type.

8 DET （用于日子、月份或节日的名称之前以表示特例）一个 You use a or an in front of the names of days, months, or festivals when you are referring to one particular instance of that day, month, or festival.

9 DET （从事某一职业的）一（位），一（名） You use a or an when you are saying what someone is or what job they have.

10 DET （用于不为说话人所知的首次提到的人名前）某一（个） You use a or an in front of the names of people as a way of indicating that you do not know them or anything about them and you are saying their name for the first time.

11 DET （用于人名前，表示与该人有相同特性或品质）类似…的一个（或一位） You use a or an in front of the names of people when you want to refer to someone else who has the same qualities or character as the person named.

12 DET （用于姓氏前，表示某人属于某姓氏家族）一位姓…的人 You use a or an in front of a surname when you want to refer to someone who belongs to the family with that surname.

13 DET （用于艺术家名字前）一幅…的画，一件…的雕塑作品 You use a or an in front of the names of artists to refer to one individual painting or sculpture created by them.

15 DET （用于表示比率的短语中）每一 You use a or an in expressions such as eight hours a day to express a rate or ratio.

英英释义

双语例句

同义词辨析

词语用例

同反义词

链接：

热门查询

大家在看

为您推荐

2
DET （指初次提及或非特指的人或物）一（个）
You use a or an when you are referring to someone or something for the first time or when people may not know which particular person or thing you are talking about.

3
DET （一类人或事物中非特指的）任何一（个）
You use a or an when you are referring to any person or thing of a particular type and do not want to be specific.

4
DET （用于前加形容词或后加修饰语的不可数名词之前）一（种）
You use a or an in front of an uncount noun when that noun follows an adjective, or when the noun is followed by words that describe it more fully.

5
DET （用于物质名词前）一（类），一（种）
You use a or an in front of a mass noun when you want to refer to a single type or make of something.

6
DET （用于表示数量的词组中）许多/少许/一点
You use a in quantifiers such as a lot ,a little, and a bit.

7
DET （一类人或事物中典型的）一（个）
You use a or an to refer to someone or something as a typical member of a group, class, or type.

8
DET （用于日子、月份或节日的名称之前以表示特例）一个
You use a or an in front of the names of days, months, or festivals when you are referring to one particular instance of that day, month, or festival.

9
DET （从事某一职业的）一（位），一（名）
You use a or an when you are saying what someone is or what job they have.

10
DET （用于不为说话人所知的首次提到的人名前）某一（个）
You use a or an in front of the names of people as a way of indicating that you do not know them or anything about them and you are saying their name for the first time.

11
DET （用于人名前，表示与该人有相同特性或品质）类似…的一个（或一位）
You use a or an in front of the names of people when you want to refer to someone else who has the same qualities or character as the person named.

12
DET （用于姓氏前，表示某人属于某姓氏家族）一位姓…的人
You use a or an in front of a surname when you want to refer to someone who belongs to the family with that surname.

13
DET （用于艺术家名字前）一幅…的画，一件…的雕塑作品
You use a or an in front of the names of artists to refer to one individual painting or sculpture created by them.

15
DET （用于表示比率的短语中）每一
You use a or an in expressions such as eight hours a day to express a rate or ratio.