can

英[kæn , kən]美[kæn , kən]

aux.能，可以，有可能；

n.罐子，一听（的量），喷雾器；

v.将…装罐保存，解雇；

过去式：could;

过去分词：could;

英语六级真题

Yet there are recent signs that the gap could be starting to shrink.

White storks feed on locusts ( ' , 蝗虫) and other insects that can become pests if their numbers get out of hand.

They could buy unique souvenirs there to take back home.

They can multiply at an accelerating rate.

They can better pull through the winter.

They can be solved with better management.

There are huge clusters of organic waste they can feed on, said Flack.

The reasoning behind this saying is that low oil prices discourage investment in new production capacity, eventually shifting the oil supply curve backward and bringing prices back up as existing oil fields—which can be tapped at relatively low marginal cost—are depleted.

The cycle continues: Poorer parents have less time and fewer resources to invest in their children, which can leave children less prepared for school and work, which leads to lower earnings.

The consumer was ultimately to be mentioned as well, especially by the likes of Dorothy Shaver, who could point to the sales figures at Lord & Taylor.

The birds can easily eat pieces of plastic or rubber hands and they can die, said Flack.

The International Monetary Fund calculates that countries can generate substantial fiscal revenues by eliminating fossil fuel subsidies and levying carbon charges that capture the domestic damage caused by emissions.

Students use forums to chat, play games, and solve problems together at no cost, or they can pay a few hundred dollars to take courses with trained teachers.

Some are pricey—a three-week intensive program can cost $4,500 or more—but most offer scholarships.

Progress in the development of renewables could be fragile, however, if fossil fuel prices remain low for long.

Participation grows through friends and networks and if you realize that's how they're growing, you can start to take action and bring in other students, he said.

Parents who are white, wealthy or college-educated say too much involvement can be bad.

Notwithstanding important recent progress in developing renewable fuel sources, low fossil fuel prices could discourage further innovation in, and adoption of, cleaner energy technologies.

Most people would love to get students from more underserved populations, but they just can't get them in the door.

Moreover, nonparticipation by nations, if sufficiently widespread, can undermine the political will of participating countries to act.

Migrating birds affect ecosystems both at home and at their winter destinations, and disrupting the traditional routes could have unexpected side effects.

Funding agencies note that data paid for with public money should be public information, and the scientific community is recognizing that data can now be shared digitally in ways that were not possible before.

Even people whose data are less popular can benefit.

Early childhood experiences can be very consequential for children's long-term social, emotional and cognitive development, said Sean Reardon, professor of poverty and inequality in education at Stanford University.

Different upbringings set children on different paths and can deepen socioeconomic divisions, especially because education is strongly linked to earnings.

Could utility alone justify the new ideas of the American designers? Fashion is often regarded as a pursuit of beauty, and some cherished fashion's trivial relationship to the fine arts.

By making the effort to organize and label files so others can understand them, scientists become more organized and better disciplined themselves, thus avoiding confusion later on.

Addressing differences in the earliest years, it seems, could reduce inequality in the next generation.

About 80% of our company's year-over-year declines in comparable sales can be attributed to shortfalls ( ' , 短缺) in cold-weather goods, said chief executive Terry Lundgren in a press release.

The don’ts can be self-fulfilling because your mind response to pictures.

In an era of instant information, shoppers can use their mobile phones to find deals.

However, today is a new era in which taking antibiotics can cause some very dangerous and potentially life threatening situations.

Can you tell us how you first became interested in this subject matter?( ' , 9 ) Wh e n f a c i n g a n e w situation, some people tend to rehearse their defeat by spending too much time anticipating the worst.

What can be done about mass unemployment? All the wise heads agree: there're no quick or easy answers.

We believe negotiation could work.

Those dangers can be addressed with farmer and consumer education, he said, while the free water and nutrients from human waste can help urban farmers in developing countries to escape poverty.

This proposal could save Medicare more than $100 billion over the next decade.

They can easily see through the businesses' tricks.

They can be dealt with through education.

They can be addressed by improved sanitation.

There're steps we can take that would make some difference, and Mayor Rahm Emanuel is trying some of them—yet the union is resisting.

The stimulus package provided money to convert the inefficient, paper-driven medical system to electronic records that can be easily viewed and transmitted.

The idea is that we are taking more out of what you might call the planet's environmental bank balance than it can sustain; we are living beyond our ecological means.

The bills in both chambers would create health insurance exchanges on which small businesses and individuals could choose from an array of private plans and possibly a public option.

Television advertising could do with a boost.

Saying that there're no easy answers sounds wise, but it's actually foolish: our unemployment crisis could be cured very quickly if we had the intellectual clarity and political will to act.

No other manufacturer can produce anything like it.

More than 80% of those cases can be attributed to contact with contaminated water and a lack of proper sanitation.

Many contemporary ideas about kitchen design can be traced back to another American, Christine Frederick, who set about enhancing the efficiency of the housewife.

It's kind of a Wild West, anybody can claim themselves to be green.

In theory, interactive advertising can engage viewers in a way that 30-second spots do not.

In cases where sewage mud is used, expensive chemical fertilizer use can be avoided.

If private plans demanded similar productivity savings from providers, and refused to let providers shift additional costs to them, the savings could be much larger.

But could Norway keep its standard of living and yet cut its emissions to Moroccan or even Ethiopian levels? That question, repeated across a dozen environmental issues and across our diverse planet, is what will ultimately determine whether the human race is living beyond its ecological means as it pursues economic revival.

Anything produced in the West can be labeled green.

Another, discussing national politics, said, I feel like one person can't do that much, and I get the impression most people don't think a group of people can do that much.

A place where women could work more efficiently.

A place where high technology could be applied.

A case can be made that rich nations export environmental problems, the most graphic example being climate change.

The negative impacts of natural disasters can be seen everywhere.

Researchers at Duke University scrutinized more than 160 published studies and found an absence of strong evidence that any of these approaches can make a big difference.

Now, a new study that began with about 1,000 children in New Zealand has tracked how a child’s low self-control can predict poor health, money troubles and even a criminal record in their adult years.

But now Israeli researchers are reporting that even sleeping in the same room can have negative consequences: not for the child,but for the mother.

A new study has failed to find any conclusive evidence that lifestyle changes can prevent cognitive decline in older adults.

a basis for explaining human genetic diversityan aid to understanding different populationsan explanation for social and cultural differencesa term to describe individual human characteristicsmodern genetics research is likely to fuel racial conflictsrace is a poorly defined marker of human genetic diversityrace as a biological term can explain human genetic diversitygenetics research should consider social and cultural variablesit is absolutely necessary to put race aside in making diagnosisit is important to include social variables in genetics researchracial categories for genetic diversity could lead to wrong clinical predictionsdiscrimination against black people may cause negligence in clinical treatmentThey be more precise with the language they use.

You can see that we're here to stay, said Vladimir Cheberdak, 57, chief of the Bellingshausen Station, as he sipped tea under a portrait of Fabian Gottlieb von Bellingshausen, a high-ranking officer in the Imperial Russian Navy who explored the Antarctic coast in 1820.

University education is becoming attractive to students who can afford it.

Their behaviors can be found in almost all teenagers on earth.

Their behaviors can be an invisible threat to society.

The Paris agreement has been widely hailed as a positive step forward in addressing climate change for all, although the details on addressing climate justice can be best described as sketchy.

That is bad news for any firm that may hope that smartwatches can make up ground for maturing smartphone and tablet markets.

That could be another explanation for why companies seem to be strengthening their talk of the practicality of their devices.

So what other variables could be used if the racial concept is thrown out? Yudell said scientists need to get more specific with their language, perhaps using terms like ancestry or population that might more precisely reflect the relationship between humans and their genes, on both the individual and population level.

Scholars warn that Antarctica's political drift could blur the distinction between military and civilian activities long before the continent's treaties come up for renegotiation, especially in parts of Antarctica that are ideal for intercepting ( ' , 拦截) signals from satellites or retasking satellite systems, potentially enhancing global electronic intelligence operations.

Mental problems can now be found in large numbers of teenagers.

It is still easy to be dazzled by the display of drones ( ' , 无人机 ), 3D printers, virtual reality goggles ( ' , 眼镜 ) and more smart devices than you could ever hope to catalog.

Having to install a different app for each smart appliance in your home is annoying; it would be nicer if you could manage everything together.

Graduates from elite universities usually can get decent jobs.

Fancy packaging can help to engage new smokers.

Essentially, I could not agree more with the authors, said Svante Pääbo, a biologist and director of the Max Planck Institute for Evolutionary Anthropology in Germany.

Beyond the Antarctic treaties, huge obstacles persist to tapping these resources, like drifting icebergs that could jeopardise offshore platforms.

Assumptions about genetic differences between people of different races could be particularly dangerous in a medical setting.

And even before then, scholars warn, the demand for resources in an energy-hungry world could raise pressure to renegotiate Antarctica's treaties, possibly allowing more commercial endeavours here well before the prohibitions against them expire.

According to the survey, that lack of enthusiasm could stem from concerns about privacy and security.

A full 18 percent have even returned devices until they feel they can get safer guarantees against having their sensitive information hacked.

You say your shop has been doing well, could you give me some idea of what doing well means in facts and figures?Birds are famous for carrying things around.

You can think of it as physical attraction.

We hope you enjoy the series about how you can make a difference by becoming a social worker.

We can’t expect kids to turn off that admiration when the same person is selling sugar.

The solution: set priorities—add up the annual cost of each item, then consider what else you could buy with the same money.

The bodies of fish and other meat eaters can build up high levels of the chemicals.

Some, like homing pigeons can be trained to deliver messages and packages.

Professor Henderson, could you give us a brief overview of what you do, where you work and your main area of research? I have many Business English students.

People who live, hunt or fish near bird coloniesneed to be careful, the researchers say, The birds don’t mean to cause harm, but the chemicals they carry can cause major problems.

Operationally, you could think intimacy as you share secrets: you share information with this person that you don’t share with anybody else.

Now what’s interesting about the theory is what do you have if you only have one out of three or two out of three? What do you have and how is it different if you have a different two out of three? What’s interesting about this kind of theorizing is it gives rise to many different combinations that can be quite interesting when you break them down and start to look at them carefully.

Now there’s a lot more evidence of how powerful a celebrity, especially a professional athlete can be in influencing children’s behavior.

It’s no surprise that high-profile athletes can influence children’s eating behaviors, but the scientists were able to quantify how prevalent these endorsements are in the children’s environment.

Few of us can fill up the tank without buying a few snacks, cigarettes, soft drinks or other items we can live without.

Even today, says the legend, the girls can be seen above the towering rock as seven shining stars in the night sky.

柯林斯高阶英汉双解学习词典释义

MODAL

(表示某事物的特点)能够，可以

You use can when you are mentioning a quality or fact about something which people may make use of if they want to.

例句

MODAL

(表示有能力或机会)能，会，可以

You use can to indicate that someone has the ability or opportunity to do something.

例句

MODAL

(用于否定句，表示情况不允许)不能，无法

You use cannot to indicate that someone is not able to do something because circumstances make it impossible for them to do it.

例句

MODAL

有可能;有时会

You use can to indicate that something is true sometimes or is true in some circumstances.

例句

MODAL

(用于否定句，表示确信某事不真实或不会发生)不可能，不会

You use cannot and can't to state that you are certain that something is not the case or will not happen.

例句

MODAL

(表示允许)可以

You use can to indicate that someone is allowed to do something. You use cannot or can't to indicate that someone is not allowed to do something.

例句

MODAL

不行;不能;不该

You use cannot or can't when you think it is very important that something should not happen or that someone should not do something.

例句

MODAL

(通常用于疑问句，表示建议或提议帮忙)能

You use can, usually in questions, in order to make suggestions or to offer to do something.

例句

MODAL

(用于疑问句时,can 表示礼貌的请求，而 can't 表示强烈请求）

You use can in questions in order to make polite requests. You use can't in questions in order to request strongly that someone does something.

例句

MODAL

(用于有礼貌地打断,或引导要说的话)能,可以

You use can as a polite way of interrupting someone or of introducing what you are going to say next.

例句

MODAL

(与 imagine, think, believe 等动词连用,用来加强语气)能

You use can with verbs such as 'imagine', 'think', and 'believe' in order to emphasize how you feel about a particular situation.

例句

MODAL

(与 how 一起用于疑问句,表示感受强烈)能,能够

You use can in questions with 'how' to indicate that you feel strongly about something.

例句

英汉词典释义

aux.

能, 能够

可以

可能, 会

[表示命令]得；必须

[表示惊讶、不相信等]到底可能；居然会，竟至于；竟能

vt.

将…装入密封罐中保存

n.

罐, 罐头

(用金属或塑料制作的)容器，罐，桶

(马口铁或其他金属制作的)食品罐头，听头

英英词典释义

Noun

1. airtight sealed metal container for food or drink or paint etc.

2. the quantity contained in a can

3. a buoy with a round bottom and conical top

4. the fleshy part of the human body that you sit on;

5. a plumbing fixture for defecation and urination

6. a room equipped with toilet facilities

Verb

1. preserve in a can or tin;

2. terminate the employment of;

行业词典

计算机： 外壳，外皮;= cancel,【ASCII】作废符，取消符；