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核心重点高频常考单词-a的发音/词性词义/用法/同近反义词/记忆法/词根词缀/高级替换词/中英文例句-秒词邦免费背单词赚钱微信小程序

2024-03-05 23:07 来源:秒词邦背单词微信小程序 阅读:286

核心重点高频常考单词-a的发音/词性词义/用法/同近反义词/记忆法/词根词缀/高级替换词/中英文例句-秒词邦免费背单词赚钱微信小程序

单词拼写:
a

音标发音:
[ə; eɪ][ə; eɪ]

速记技巧:
对比记忆法
拆:
对比记忆a和an
记:
a用在辅音音素开头的单数可数名词前,而an则用在元音因素开头的单数可数名词前。如a man 一个男人;an apple一个苹果。

英英释义:
Noun:
1.a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation2.any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes3.one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)4.(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA5.the basic unit of electric current adopted under the Systeme International d'Unites; "a typical household circuit carries 15 to 50 amps"6.the 1st letter of the Roman alphabet7.the blood group whose red cells carry the A antigen

短语词组:
with a pinch of salt有保留地
stand a chance有希望
a dose of one's own medicine自己惹来的恶果,自己...
flog a dead horse徒劳无益
keep a stiff upper lip坚定不移(顽强不屈...
a bag of bones骨瘦如柴的人...
once in a blue moon罕见的,极少的,难得...
show a clean pair of heels逃走(溜之大吉)...
birds of a feather同类型的人
with a grain of salt有保留地
bring to a stand终止
turn over a new leaf重新开始
as a matter of fact事实上
bring to a standstill结束(使终止...
turn up again like a bad penny不要它偏又回来,挥去...
at a loose end无事做
throw a fit大发脾气
blow a fuse使保险丝熔断(勃然大...
cut a poor figure出丑
take something with a grain of salt将信将疑


同义词辨析:
a (an) one【导航词义:一个】
a (an)indef. art.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。
onenum.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。


双语例句:
1.oh never metion it, a factory beside my house made noise all around yesterday, i'd gotta be deaf without an earplug.
别提了。昨天我家旁边的工厂不断发出噪音一整天,如果没有耳塞我可能就聋了。
2.looks dry to me, but you may be able to squeeze out a few drops.
那个柠檬看来已经干了,但也许你还能挤出几滴汁来。
3.The shortish and baldish former gold salesman is about as far from the popular image of a Wall Street titan as you can get.
这位前“黄金推销员”个头不高,有些谢顶,远非你所想象的那种受欢迎的华尔街巨头。
4.Paltrow portrays an opportunistic thief with a willingness to lift the jewelry from the dead and a cold-hearted view of men.
帕特洛描绘与愿意取消从死者和一冷心肠的人认为是机会主义的珠宝窃贼。
5.Through chattering teeth, she told her that she was cold, that she wanted a sheet for her gurney.
她问,能不能给她个床单。她太冷了,牙齿都冷的一直在打架。
6.In recent years, Henry Hu, a finance professor at Texas University, has often been a thorn in the side of the banking world.
近些年,得克萨斯大学(TexasUniversity)金融学教授亨利•胡(HenryHu)屡屡被银行界视作眼中钉。
7.I suppose if I were East Indian, then I would be proud of it, but as such, I only pointed it out as a known fact.
如果我要是东印度人,那么我确实会骄傲,但我只是将那些当做众人皆知的事实说了出来。
8.The researcher as teacher differs from the previous analogies, and that very distinction is often thought to make him or her a good teacher.
把教师比作研究者与刚才的比拟不同,有个很大的差别就试,常常以为研究工作能使他或她成为好老师。
9.You really love the Man, with a total not to tell you thinking, because in fact his plan for you with the most beautiful real future.
真正爱你的男人,总告诉你不要胡思乱想,因为其实他在为你们谋划着最美丽真实的未来。
10.It was like they were taken into a bomb alley and attacked. They complained of brutality and shameful treatment.
就好象他们被带入了一条充满炸药的小路然后被攻击了。他们抱怨遭受到的野蛮而无耻的袭击。


全部四级六级高考考研例句:
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
why must we learn to identify the risks we are going to take?
出自-2011年12月阅读原文
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
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
"Pleasure" is not a dirty word.
2015年12月四级真题(第一套)阅读 section B
"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
"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
"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
"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
"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
"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
"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
"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
"I am a visionary." he says.
2019年12月四级真题(第一套)阅读 Section B
"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
"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
"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
"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
"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
"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
"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
"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
"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
"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
"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
"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
"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 says.
2019年12月四级真题(第三套)阅读 Section B
"Meals are the foundation of the family," says Carole Counihan, a professor at millersville University in Pennsylvania, "so there was a very important interconnection between eating together and strengthening family ties."
2016年6月四级真题(第二套)阅读 Section C
"My memory is like a library of video tapes, walk-throughs of every day of my life from waking to sleeping," he explains.
2017年6月四级真题(第一套)阅读 Section B
"One of the reasons I find this topic very interesting is because my mom was a smoker when I was younger," says lindson-Hawley, who studies tobacco and health at the University of Oxford.
2017年6月四级真题(第三套)阅读 Section C
"Say, you know, this is the best student I've ever had," says Kuheli Dutt, a social scientist and diversity officer at Columbia University's Lamont campus. "Compare those excellent letters with a merely good letter: 'The candidate was productive, or intel
2017年12月四级真题(第二套)阅读 Section C
"Strength, softness and thickness remain the leading indicators of toilet paper quality, with just a small proportion of consumers preferring more luxurious alternatives, such as those with flower patterns or perfume," said mintel analyst Jack Duckett.
2017年6月四级真题(第三套)阅读 Section C
"The body uses a lot of energy stores for growth and repair through the night," explains diet specialist Sarah Elder.
2019年12月四级真题(第三套)阅读 Section B
"The fact that participants were willing to substitute part of a food item for the mere prospect of a relatively small monetary award is interesting," says Reimann.
2016年12月四级真题(第三套)阅读 Section C
"The link between sleep and health, and bad sleep and disease is becoming clearer and clearer," says Lawrence Epstein, a sleep expert at Harvard University.
2016年6月四级真题(第一套)听力 Section C
"The move to recapture a small part of the profits from an industry that pushes a product that contributes to diabetes, obesity and heart disease in poorer communities in order to reinvest in those communities will sure be inspirational to many other plac
2019年12月四级真题(第一套)阅读 Section C
"There are a lot of studies on the relationship between breakfast eating and possible health outcomes, but this may be because those who eat breakfast choose to habitually have health-enhancing behaviours such as regular exercise and not smoking," she say
2019年12月四级真题(第三套)阅读 Section B
"There's a mountain of evidence 34 proving the importance of sex influences at all levels of brain function," he told The Seattle times.
2016年12月四级真题(第一套)阅读 Section A
"There's an ancient legend that as long as these eggs are made, evil will not prevail in the world," says Joan Brander, a Canadian egg-painter who has been painting eggs for over 60 years, having learned the art from her Ukrainian relatives.
2017年6月四级真题(第一套)阅读 Section C
"These patterns suggest that some types of mental flexibility decrease relatively early in adulthood, but that the amount of knowledge one has, and the effectiveness of integrating it with one's abilities, may increase throughout all of adulthood if there
2016年6月四级真题(第一套)阅读 Section C
"This finding supported ConAgra's decision to position the product against other high quality frozen dinners, rather than as a diet or health food.
2015年12月四级真题(第二套)听力 Section C
"This is Hesiod, of course, a younger contemporary poet, we believe, with Homer," Soupios says.
2016年6月四级真题(第二套)阅读 Section B
"We are at a point where in much of the developed world the vast majority of young people grew up playing video games, and an increasingly high percentage of adults play these video games too," Werbach says.
2016年12月四级真题(第三套)阅读 Section B
"We realize that as a company with people, trucks, warehouses, we needed to play a larger role," said Eduardo Martinez, the president of the UPS Foundation.
2019年12月四级真题(第二套)阅读 Section B
"What makes a game game-like is that the player actually cares about the outcome," Werbach says.
2016年12月四级真题(第三套)阅读 Section B
"When you're emotionally vulnerable, you're even more in need of a caring human being," he says.
2019年6月四级真题(第三套)阅读 Section C
"You suspended Ray rice after our video," a reporter from TMZ challenged National Football League Commissioner Roger Goodell the other day.
2017年12月四级真题(第二套)阅读 Section B
"You would want that robot preloaded with a good set of values," said Russell.
2016年6月四级真题(第三套)阅读 Section C
A 16th century castle in Scotland is close to collapsing after lumps of soil were washed away by floods, threatening its foundations.
2016年12月四级真题(第一套)听力 Section A
A 16-year-old asked a stranger at a grocery store to buy him and his mother some food in exchange for carrying the man's groceries to his car.
2017年12月四级真题(第一套)听力 Section A
A 2009 University of British Columbia study of women with an eating disorder who were taught to knit found that learning the craft led to significant improvements.
2017年12月四级真题(第三套)阅读 Section B
A 2016 review of 10 studies looking into the relationship between breakfast and weight management concluded there is "limited evidence" supporting or refuting (反驳) the argument that breakfast influences weight or food intake, and more evidence is required
2019年12月四级真题(第三套)阅读 Section B
A 20-year-old junior at Georgia Southern University told BuzzFeed News that she normally spends $500-600 on access codes for class.
2018年6月四级真题(第三套)阅读 Section B
A 4-year-old may 27 protest that a sister has more fruit juice when it is only the shapes of the glasses that differ, not the 28 amount of juice.
2015年12月四级真题(第二套)阅读 Section A
A 9-year-old girl in New Mexico has raised more than $500 for her little brother who needs heart surgery in Houston,Texas this July.
2017年12月四级真题(第二套)听力 Section A
A bridge with big, light-blue loops leads into the business district.
2019年12月四级真题(第一套)阅读 Section B
A business professor says that a future city should have easy access to international transportation.
2019年12月四级真题(第一套)阅读 Section B
A California television station in Fresno reported Tuesday that James Savage set a record as the youngest swimmer to make the journey to the former prison.
2019年6月四级真题(第一套)听力 Section A
A child's ability to become deeply absorbed in something, and derive intense pleasure from that absorption, is something adults spend the rest of their lives trying to return to.
2015年12月四级真题(第一套)阅读 Section B
A commentary in the Shanghai Daily points out that innovation doesn't mean piles of documents.
2016年6月四级真题(第一套)听力 Section A
A company should find ways to innovate not just in products but also in functions, business models and processes.
2016年6月四级真题(第一套)听力 Section A
A couple of recent papers have finally opened a window on these people's extraordinary minds.
2017年6月四级真题(第一套)阅读 Section B
A decorated egg thrown into the field would be a wish for a good harvest.
2017年6月四级真题(第一套)阅读 Section C
A decorated egg with a bird on it, given to a young married couple, is a wish for children.
2017年6月四级真题(第一套)阅读 Section C
A dedicated USPS employee was on the job carrying out duties in spite of extreme conditions.
2019年12月四级真题(第二套)阅读 Section B
A different interpretation is possible when the actual amount of information acquired by the user is taken into account.
2015年12月四级真题(第一套)阅读 Section A
A drop in oxygen pressure can cause headaches in certain individuals.
2019年12月四级真题(第三套)阅读 Section A
A drug is a chemical substance.
2015年12月四级真题(第二套)听力 Section C
A drug user is the person who takes the drug.
2015年12月四级真题(第二套)听力 Section C
A dry mouth may reduce taste sensitivity, but taste is restored by drinking fluids.
2019年12月四级真题(第三套)阅读 Section A
A face-to-face communications is the most intimate.
2018年12月四级真题(第二套)阅读 Section A
A few additional roads would come later.
2018年6月四级真题(第二套)听力 Section C
A few minutes later, the pressured strokes started to produce a relieving effect and my body and mind began to sink deeper into relaxation.
2018年12月四级真题(第三套)阅读 Section A
A few months ago, I was down with a terrible cold which ended in a persistent bad cough.
2018年12月四级真题(第三套)阅读 Section A
A fixed mind-set can also hinder communication and progress in the workplace and discourage or ignore constructive criticism and advice.
2016年12月四级真题(第二套)阅读 Section B
A fourth of this year's U.S. grain harvest will go to fuel cars.
2016年6月四级真题(第一套)阅读 Section B
A freshman textbook will have dozens of contributors, from subject-matter experts through graphic and layout artists to expert reviewers and classroom testers.
2019年12月四级真题(第三套)阅读 Section C
A friend recently took her mother to visit an expensive assisted living / nursing home near my town.
2016年6月四级真题(第三套)阅读 Section B
A friend told me the following story.
2015年12月四级真题(第一套)阅读 Section B
A gamification strategy that is not sufficiently thought through or well tailored to its players may engage people for a little while, but it will not motivate people in the long term.
2016年12月四级真题(第三套)阅读 Section B
A golden or lucky birthday is when one turns the age of their birth date.
2017年12月四级真题(第二套)听力 Section B
A good rule of thumb is that as soon as generals and hospital administrators jump on a management bandwagon (追随—种管理潮流), it is time to ask questions.
2017年6月四级真题(第三套)阅读 Section B
A good system is one that keeps that worst-case setting as improbable as possible while also offering strong protection in the event of a less-extraordinary attack.
2016年12月四级真题(第一套)阅读 Section B
A letter written by Charles Darwin in 1875 has been returned to the Smithsonian Institution (档案馆) by the FBI after being stolen twice.
2018年6月四级真题(第二套)阅读 Section C
A little extra height brings a number of advantages, says Elio riboli of Imperial College.
2019年6月四级真题(第二套)阅读 Section C
A local radio said an unspecified number of people were rescued, including the tour boat's owner hilario Blandon.
2017年6月四级真题(第一套)听力 Section A
A longer lifespan is changing the narrative structure of life itself.
2017年6月四级真题(第一套)阅读 Section C
A lot has changed since we were last in school.
2017年12月四级真题(第一套)阅读 Section B
A maker space is a place which can be in a school, but it doesn't look like a classroom.
2019年6月四级真题(第三套)阅读 Section B
A man called Naddodd was on his way from Norway to the Faroe Islands, north of England, when his ship was caught in a storm.
2017年12月四级真题(第一套)听力 Section C
A man described as a "non-worker civilian" was buried up to his waist in the basement.
2018年12月四级真题(第二套)听力 Section A
A man from Libya was enjoying a walk along the sands at southport beach.
2019年12月四级真题(第二套)听力 Section A
A message in a bottle sent out to sea by a New Hampshire man more than five decades ago was found 1500 miles away and has been returned to his daughter.
2018年6月四级真题(第二套)听力 Section A
A Moon Express representative declined to comment on the story, but noted that the company is very optimistic about its proposal.
2018年6月四级真题(第一套)听力 Section A
A multi-stage life will have profound changes not just in how you manage your career, but also in your approach to life.
2019年6月四级真题(第一套)阅读 Section B
A new batch of young women—members of the so-called millennial (千禧的) generation—has been entering the workforce for the past decade.
2018年6月四级真题(第三套)阅读 Section C
A New Jersey black bear that walks upright on its two back legs and has become a social media darling has re- emerged and has been captured on video months after its last sighting.
2017年12月四级真题(第一套)听力 Section A
A new Peabody study of the Tennessee Voluntary Pre-K program reports that pre-K works, but the gains are not sustained through the third grade.
2016年6月四级真题(第一套)阅读 Section C
A new species of snake has been discovered on a remote island in the Bahamas.
2017年6月四级真题(第二套)听力 Section A
A new study challenges that belief, questioning whether brains really can be distinguished by gender.
2016年12月四级真题(第一套)阅读 Section A


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