a

[ei,ə]

art.一(个), 每一(个), 任一（个）

art.

1. 一

He has got a job in Los Angeles.

他已在洛杉矶找到一份工作。

2. 任一

A triangle has three sides.

三角形有三条边。

3. 某一

A Mr. Brown wishes to see you.

一位叫布朗的先生想见你。

4. 每一

We met once a week.

我们每周见面一次。

词形变化

名词复数: a's |

词义辨析

同义参见:

any  one  

英英释义

名词 a:

a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

同义词：angstrom, angstrom unit

any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

同义词：vitamin A, antiophthalmic factor, axerophthol

one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

同义词：deoxyadenosine monophosphate

(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

同义词：adenine

the basic unit of electric current adopted under the Systeme International d'Unites

同义词：ampere, amp

the 1st letter of the Roman alphabet

同义词：letter a

the blood group whose red cells carry the A antigen

同义词：type A, group A

补充

aa英:[ei; ə] 美:[e,ə]art.1.表示“一(个, 件…)He needs an assistant.他需要一位助手。2.(非特指的)一(个)He works in a factory.他在一家工厂工作。When I entered the room, I saw a man standing at the window.我走进房间时, 看见一个男人站在窗前。3.(同类事物中的)任何一(个)A child needs love.儿童需要爱。4.(用于表示时间、速度、价格等意义的)每一The boy was paid two dollars a day.那男孩每天挣两美元。Apple costs five dollars a kilogram.苹果每千克五美元。5.(用在某些物质名词和抽象名词前)一阵、一场、一种A gentle wind disturbed the surface of the water.微风拂动水面。He was caught in a heavy rain.他遇上了一阵大雨。

例句

1. Today you've got a new teacher taking you.今天有一位新老师带你们。 2. Bring a sleeping bag.带个睡袋吧。 3. I was waiting for a bus.我在等公共汽车。 4. There was a terrible sadness in his eyes.他眼里有一种极度的悲伤。 5. Use a hard cheese, like Cheddar.用一种硬奶酪, 比如切达奶酪。 6. Roses grow best in a clay soil.玫瑰在黏质土壤中长得最好。 7. I'll have a coffee.我要喝一杯咖啡。 8. He's a bully.他是个恶霸。 9. It's ten years since the country became a democracy.该国成为民主国家已经十年了。 10. She's a doctor.她是个医生。 11. He works as a minicab driver.他是个小型出租车司机。 12. an ostrich cannot fly.鸵鸟不能飞。 13. a child needs praise.孩子需要夸奖。 14. The interview took place on a Friday.面试是在周五进行的。 15. Did you have a good Christmas?你圣诞节过得好吗？ 16. The drawing fetched a record price for a Michelangelo.这幅画创下了米开朗琪罗作品的售价纪录。 17. They travelled over a thousand miles.他们行程超过一千英里。 18. a quarter of an hour一刻钟 19. at a speed of 10 kilometres an hour以每小时10公里的速度 20. Carrots cost 70 pence a kilo.胡萝卜每公斤70便士。 21. I spend a lot on expensive jewellery.我花很多钱买昂贵的珠宝。 22. I've come looking for a bit of advice.我来咨询点儿建议。 23. He fancied himself as a bit of a Romeo.他自以为有点儿罗密欧的气质。 24. He didn't have the brain of an Einstein.他没有爱因斯坦那样的头脑。 25. There's a Mr Smith on the phone for you.有一位史密斯先生打电话找你。 26. They'd a said if they'd known.他们要是知道就说了。 27. He's kinda nice.他挺好的。 28. It's sorta sad.这有点儿让人难过。 29. You are a clever boy.你是个聪明的孩子。 30. She's a Muslim.她是穆斯林。 31. He's a doctor.他是医生。 32. Have you got a dictionary (= any dictionary)?你有词典吗？ 33. I saw a dog chasing a cat this morning. The cat climbed up a tree.今天早上我看见狗在追猫。那只猫爬了上树。 34. We've got an apple, a banana and two oranges.我们有一个苹果、一根香蕉和两个橘子。 35. We planted a tree.我们种了一棵树。 36. a gun is dangerous.枪是危险品。 37. once a day一天一次 38. twice a week每周两次 39. a happiness that she couldn’t quite hide她所按捺不住的内心喜悦 40. It was a cold December.那是一个寒冷的12月。 41. a black tea一种红茶 42. They have had a friendship of ten years.他们已有10年的友谊。 43. a Communist一名共产党员 44. a Miss Helen called you just now.有一位海伦小姐刚刚打电话给你。 45. a Watergate一则水门事件式丑闻 46. the people all of a mind同心同德的人们(或持相同意见的人们) 47. a cup and saucer一只带茶托的茶杯 48. a falls in the Niagara River尼亚加拉河上的一幕瀑布 49. a man falls overboard!有人落水啦! 50. a barracks一座兵营 51. a Cicero in eloquence一个口才和西赛罗一样(好)的人 52. Her grandfather is a healthy 90.她祖父现年90岁，仍很健康。 53. a Boeing 737一架波音 737 型飞机 54. a million thanks非常感谢 55. a crescent moon新月 56. I must get (或 have) a wash.我必须洗一下。 57. I was there for a time.我在那里呆了一些时候。 58. never a one没有一个(人) 59. You should a thought of it.你该想到这一点。 60. a cup a tea一杯茶 61. a cup of coffee, please.请给我一杯咖啡。 62. a man came out of the room.一个男人走出了房间。 63. it has been an honour to have you.你能来真是荣幸。 64. we need people with a knowledge of languages.我们需要有语言知识的人。 65. a hundred.一百。 66. a quarter of an hour.一刻钟。 67. I simply haven't a thing to wear.我简直没有衣服可穿。 68. a Mr Smith telephoned.有个史密斯先生打电话来过。 69. you're no better than a Hitler.你就像个希特勒。 70. he is a lawyer.他是律师。 71. this car is a BMW.这是辆宝马车。 72. typing 60 words a minute.每分钟打60个词。 73. a move to raise petrol prices by 3p a litre.将汽油价格每升提高三便士的动议。 74. Penzance a 0915.9点15分到达彭赞斯。 75. March 15 Sheffield United (a).设菲尔德联队将于3月15日在客场举行比赛。 76. a few cars几辆汽车 77. a lot of money很多钱 78. He was travelling at about 80 miles an hour.他当时正以每小时约80英里的速度行进。 79. twice a week一星期两次 80. I usually drink two litres of water a day.我一天通常喝两升水。 81. ‘Is that an eagle?’‘No, it's a falcon.’“那是鹰吗？”“不，是隼。” 82. a word that begins with an a以字母a开头的单词 83. a word that begins with a以字母a开头的单词 84. play/sing an a演奏/演唱A调 85. a song in the key of a*A调歌曲 86. She got an a on the exam.她考试得了个A。 87. He's an a student. [=a student who gets a's for his schoolwork]他是一个头等生。 88. "If a, B, and C divide the coins equally, how many does each person get?"如果甲、乙、丙三人均分这些硬币，每人获得几枚？ 89. The book is titled “Home Repairs From a to Z.”这本书名为《家庭修理大全》。 90. I don't care about the scenery. I'm only interested in getting from a to B.我不在乎风景。我就喜欢东游西逛。 91. a door一扇门 92. a human一个人 93. an icicle一条冰柱 94. an honor一项荣誉 95. a one一个单词 96. a union一个联盟 97. an FBI investigation联邦调查局的一项调查 98. an LCD display一台液晶显示器 99. a historic一个历史性的 100. an historic一个历史性的 101. There was a tree in the field.田野里有一棵树。 102. a man walked past him.一个人从他身边走过。 103. I heard a shout.我听到一声喊叫。 104. "He bought a house, but this is not the house he bought."他买了一栋房子，但是这栋房子并不是他买的那一栋。 105. I ordered an apple and some cheese: I ate the apple but not the cheese.我点了一个苹果和一些奶酪：我把苹果吃了，但没吃奶酪。 106. a hundred and twenty people一百二十人 107. a million dollars一百万美元 108. a dozen doughnuts一打炸面圈 109. This is a [=one] third the size of that.这个的尺寸只有那个的三分之一。 110. a pound or two [=one or two pounds]一磅或两磅 111. a week or two [=one or two weeks]一周或两周 112. a foot and a half of water = one and a half feet of water*1.5英尺深的水 113. They didn't charge me a penny. [=they didn't charge me anything at all]他们没有收我一分钱。 114. “Did she say anything about it?” “Not a word.”“她对此事说什么了吗？”“一个字都没说。” 115. My uncle is a plumber.我叔叔是个水管工。 116. Copper is a metal.铜是一种金属。 117. She's a very nice lady.她是一位很和善的女士。 118. a torrential rain一阵急雨 119. She has a warmth that puts people at ease.她待人热情，让人感到亲切。 120. I've always had a fondness for chocolate.我一直很爱吃巧克力。 121. a person who is sick can't work well. [=people can't work well if they are sick]生病的人工作效率不高。 122. a Mr. Smith [=a man named Mr. Smith] called to ask about the job.一位史密斯先生打电话询问工作的事。 123. "among the towns of the area there is a Newton, I believe."据我了解，这个地区有一个牛顿镇。 124. the attractions of a Boston or a Cleveland波士顿或克利夫兰这类城市的景点 125. His friends say he's an Einstein in regard to science.他的朋友们说，在科学方面他是爱因斯坦式的人物。 126. My birthday falls on a Tuesday this year.今年我的生日是一个星期二。 127. The museum recently purchased a Rembrandt. [=a painting by Rembrandt]博物馆最近购入了一幅伦勃朗的画作。 128. My violin is a Stradivarius.我的小提琴出自大师斯特拉迪瓦里之手。 129. Did you know that she's a Kennedy?你知道她是肯尼迪家族的一员吗？ 130. a triumphant Ms. Jones greeted her supporters. [=Ms. Jones was triumphant when she greeted her supporters]志得意满的琼斯女士向支持者们致意。 131. We were met at the door by an embarrassed Mr. Brown. [=Mr. Brown was embarrassed when he met us at the door]布朗先生在门口见到我们时神色尴尬。 132. We had a very mild January.一月的天气非常温和。 133. She felt a bit tired.她感到有点疲惫。 134. It's getting a little late.天有点晚了。 135. They meet twice a week. [=twice each week]他们一周见两次面。 136. The car was traveling at a hundred miles an [=per] hour.汽车当时正以一百英里的时速行驶。