a: [OE] The indefinite article in English is ultimately identical with the word one (as is the case, even more obviously, in other European languages – French un, German ein, and so on). The ancestor of both a(n) and one was ān, with a long vowel, but in the Old English period it was chiefly used for the numeral; where we would use a(n), the Anglo-Saxons tended not to use an article at all. Ān begins to emerge as the indefinite article in the middle of the 12th century, and it was not long before, in that relatively unemphatic linguistic environment, its vowel became weakened and shortened, giving an.
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And at about the same time the distinction between an and a began to develop, although this was a slow process; until 1300 an was still often used before consonants, and right up to 1600 and beyond it was common before all words beginning with h, such as house.
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=> one
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a (1)
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indefinite article, mid-12c., a variation of Old English an (see an) in which the -n- began to disappear before consonants, a process mostly complete by mid-14c. The -n- also was retained before words beginning with a sounded -h- until c. 1600; it still is retained by many writers before unaccented syllables in h- or (e)u-, but is now no longer normally spoken as such. The -n- also lingered (especially in southern England dialect) before -w- and -y- through 15c.
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a (2)
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as in twice a day, etc., from Old English an "on," in this case "on each." The sense was extended from time to measure, price, place, etc. The habit of tacking a onto a gerund (as in a-hunting we will go) died out 18c.
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双语例句:
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1. Liver and kidney are particularly rich in vitamin A.
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肝脏和肾脏富含维生素A。
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来自柯林斯例句
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2. Details are available from the Hon. Sec. A.R. Bushby.
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详情可咨询名誉秘书A.R.布什比。
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来自柯林斯例句
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3. I was assigned to Troop A of the 10th Cavalry.
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我被派往第10骑兵队的A连。
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来自柯林斯例句
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4. Passes are graded from "A" down to "E".
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及格分为A到E几等。
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来自柯林斯例句
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5. Use only clean, Grade A, perfect eggs.
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只用表面干净、无磕碰的A级鸡蛋。
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来自柯林斯例句
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更多相关例句:
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a good knowledge of French
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精通法语【牛津词典】
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I can only carry two at a time.
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我一次只能带两个。【牛津词典】
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There's a visitor for you.
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有位客人找你。【牛津词典】
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She's a friend of my father's (= one of my father's friends) .
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她是我父亲的一位朋友。【牛津词典】
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a man/horse/unit
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一个人;一匹马;一个单位【牛津词典】
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an aunt/egg/hour/x-ray
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一个姑母;一个鸡蛋;一小时;一张X光片【牛津词典】
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...a quarter of an hour...
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一刻钟【柯林斯高阶英语词典】
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Prices start at £13.95 a metre for printed cotton...
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印花棉布以每米13.95英镑的价格起售。【柯林斯高阶英语词典】
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The helicopter can zip along at about 150 kilometres an hour.
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该直升机能以每小时150公里左右的速度疾进。【柯林斯高阶英语词典】
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Most people have very little difficulty in seeing why a Van Gogh is a work of genius.
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多数人不难理解为什么凡·高的作品是天才之作。【柯林斯高阶英语词典】
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...more than a thousand acres of land.
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1,000多英亩地【柯林斯高阶英语词典】
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The full address on a stick-on label was that of a Mrs P. R. Slater of Peterborough...
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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。【柯林斯高阶英语词典】
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A Dr Matthew Owens was reported missing while on an expedition to north-eastern Turkey.
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据报道,一位叫马修·欧文斯的博士在前往土耳其东北部考察的途中失踪了。【柯林斯高阶英语词典】
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When I listen to her play I can hear a new Nigel Kennedy.
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从她的演奏中我听出了新一代的奈杰尔·肯尼迪。【柯林斯高阶英语词典】
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As far as I can recall, Patti was a Smith.
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我记得帕蒂是姓史密斯的。【柯林斯高阶英语词典】
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I explained that I was an artist...
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我解释说自己是个艺术家。【柯林斯高阶英语词典】
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He was now a teacher and a respectable member of the community.
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他现在是一位教师,并且是社区内受人尊敬的一员。【柯林斯高阶英语词典】
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It was a Christmas when shoppers passed by expensive silks in favor of more practical gifts.
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这是一个购物者不理会昂贵的丝绸衣服而热衷于更实用礼物的圣诞节。【柯林斯高阶英语词典】
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There was a terrible sadness in her eyes...
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她眼神中流露出深深的悲伤。【柯林斯高阶英语词典】
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He did have a real knowledge of the country...
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他对该国的确知之甚多。【柯林斯高阶英语词典】
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Bollinger 'RD' is a rare, highly prized wine.
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博林格RD香槟是一种名贵的备受推崇的葡萄酒。【柯林斯高阶英语词典】
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I spend a lot on expensive jewelry and clothing...
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我花很多钱购买昂贵的首饰和衣服。【柯林斯高阶英语词典】
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I've come looking for a bit of advice.
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我特来讨教。【柯林斯高阶英语词典】
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Some parents believe a boy must learn to stand up and fight like a man.
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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。【柯林斯高阶英语词典】
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...the operation a patient has had.
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病人做过的手术【柯林斯高阶英语词典】
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The interview took place on a Friday afternoon...
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采访是在一个星期五的下午进行的。【柯林斯高阶英语词典】
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...expensive make-up that we saw being advertised by a beautiful model...
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我们所见的由一位漂亮模特代言的昂贵化妆品【柯林斯高阶英语词典】
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I suggest you leave it to an expert...
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我建议你把它留给专家来解决。【柯林斯高阶英语词典】
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A waiter entered with a tray...
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侍者端着托盘进来了。【柯林斯高阶英语词典】
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He started eating an apple...
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他开始吃苹果。【柯林斯高阶英语词典】
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After financial disasters family members also tend to do whatever they can to help each other and their communities, A 1940 book.【出自-2012年6月阅读原文】
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why must we learn to identify the risks we are going to take?【出自-2011年12月阅读原文】
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For many families the recession means more than not booking a holiday A You Gov poll of 2, 000 people found 22% said they were arguing more with their partners because of concerns about money【出自-2011年12月阅读原文】
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Caught in the Web A few months ago, it wasn't unusual for 47-year-old Carla Toebe to spend 15 hours per day online【出自-2010年6月阅读原文】
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"Pleasure" is not a dirty word.【2015年12月四级真题(第一套)阅读 Section B】
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"A balanced breakfast is really helpful, but getting regular meals throughout the day is more important to leave blood sugar stable through the day, which helps control weight and hunger levels," says Elder.【2019年12月四级真题(第三套)阅读 Section B】
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"A well-displayed meal is enhanced one hundred percent in my eyes," he later wrote in one of his cook books.【2018年12月四级真题(第二套)阅读 Section B】
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"Antarctica creates a hostile environment," says the operation director for the British Antarctic Survey.【2019年6月四级真题(第二套)听力 Section A】
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"As what happened with tobacco, this will require a cultural shift, but that can happen," says Nguyen. "In the same way physicians used to smoke, and then stopped smoking and were able to talk to patients about it,I think physicians can have a bigger voic【2018年12月四级真题(第一套)阅读 Section B】
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"Being taller is associated with longer life expectancy," he said, "This is largely due to a lower risk of dying of cardiovascular (心血管的) disease among taller people."【2019年6月四级真题(第二套)阅读 Section C】
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"Chauncy is a top student who is doing his best to make it in a world with no money and very few resources," White explained on the crowd-funding site.【2017年12月四级真题(第一套)听力 Section A】
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"Gamification is about understanding what it is that makes games engaging and what game designers do to create a great experience in games, and taking those learnings and applying them to other contexts such as the workplace and education," explains Kevin【2016年12月四级真题(第三套)阅读 Section B】
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"highly superior autobiographical memory" or HSAM for short, first came to light in the early 2000s, with a young woman named jill Price.【2017年6月四级真题(第一套)阅读 Section B】
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"I am a visionary." he says.【2019年12月四级真题(第一套)阅读 Section B】
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"I followed my route like I normally do," Smith told a reporter.【2019年12月四级真题(第二套)阅读 Section B】
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"I have been bothered for a long time about the curious lack of curiosity,"said a Democratic member of the New Jersey legislature back in July, referring to an insufficiently inquiring attitude on the part of an assistant to New Jersey Governor Chris Chri【2017年12月四级真题(第二套)阅读 Section B】
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"I prefer take home essays because it is then really about the writing, so you have time to edit and do more research," says Elizabeth Dresser, a junior at Barnard.【2017年12月四级真题(第一套)阅读 Section B】
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"I think we're unique as a federal agency," USPS official Mike Swigart told me, "because we're in literally every community in this country."【2019年12月四级真题(第二套)阅读 Section B】
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"If we are designing for engineers, I'm not talking about a "game" at all," Cornetti says.【2016年12月四级真题(第三套)阅读 Section B】
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"In fact, there is almost no hard evidence for midlife crisis other than a few small pilot studies conducted decades ago," Barbara Hagerty writes in her new book, life Reimagined.【2017年6月四级真题(第一套)阅读 Section C】
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"It actually had a very negative effect on morale and performance," Werbach says.【2016年12月四级真题(第三套)阅读 Section B】
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"It is a thing of no great difficulty," according to Plutarch," to raise objections against another man's speech, it is a very easy matter; but to produce a better in its place is a work extremely troublesome."【2015年12月四级真题(第二套)阅读 Section B】
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"It's an important, cautionary note that we shouldn't get too carried away with the idea that a computer system can replace doctors and therapists," says Christopher Dowrick, a professor of primary medical care at the University of liverpool.【2019年6月四级真题(第三套)阅读 Section C】
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"It's been postponed until 2017," says Anna Somers, the founder and CEO of The Art Newspaper and the former head of Venice in Peril, a group devoted to restoring Venetian art.【2018年6月四级真题(第二套)阅读 Section B】
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"It's been postponed until 2018," says Anna Somers, the founder and CEO of The Art Newspaper and the former head of Venice in Peril, a group devoted to restoring Venetian art.【2017年12月四级真题(第一套)阅读 Section B】
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"Just because I have a business relationship with an individual and I can profit from that relationship, it does not necessarily mean that this person is my friend," Soupios says.【2016年6月四级真题(第二套)阅读 Section B】
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"Looking at studies that tested concentration, the number of studies showing a benefit was exactly the same as the number that found no benefit," she