- adv.一次，一趟; 一倍; 曾经; 一旦;
- conj.一旦…就…; 一经;
She guessed the right answer at once.
He will explain it fully once and for all.
The batsman began slowly but once he got his eye in he started to play some very good shots.
She braced herself up and tried once more.
Their attempts at conciliation had failed and both sides were once again in dispute.
Not once have the workers of our factory succeeded in inventing new machines, but many times.
Once a knave, ever a knave.
Let's go through the sonata once more.
Once you're stuck in deep snow, it's difficult to lever yourself out.
All at once he fell into a state of profound melancholy.
The court laid the young thief under an obligation to report to the police station once a week.
Slavery was once socially sanctioned.
He had seen her only once since the meeting.
This area was once a wildlife reserve.
Once people retire they automatically cease to be union members.
Once these difficulties were got over, the work would speed up.
Hearing that there was an emergency case, the doctor put down his chopsticks and left at once.
I have been there once.
I took the hint and left at once.
Once you've given your word, don't try to back out.
If you find anything wrong with the machine, you should put it right at once.
On hearing that the new novel was published, he rushed at once to the bookshop for a copy.
After ten years'hard study noticed by none, his fame fills the land once honours are won.
I don't want ifs and buts; swallow your medicine at once.
She told him to leave the room at once.
I want to see her once more.
He determined to go [ that he ( should ) go ] at once.
You want to see a doctor at once.
Where are you in the cycle of renewal: Are you actively preserving the present, or selectively forgetting the past, or boldly creating the future? What advice would Leah give you to move you ahead on your journey? Once we're on the path of growth, we can continually move through the seasons of transformation and renewal.
The late Richard Hackman of Harvard University once argued, I have no question that when you have a team, the possibility exists that it will generate magic, producing something extraordinary… But don't count on it.
What people were like when they came in had greater consequence than what happened once they were there.
Trigger its built-in alarm system at once.
She has once run a pre-K program.
Once driverless cars are actually for sale, the early adopters will be the people who can afford to buy them.
Wireless devices will transmit signals so as to activate the alarm once something wrong is detected.
Sugar, alcohol and tobacco, economist Adam Smith once wrote, are commodities which are nowhere necessaries of life, which have become objects of almost universal consumption, and which are, therefore, extremely popular subjects of taxation.
So, too, would the motion detectors in your home, so the thief will need to continue jamming once he's inside and searching for things to steal.
This once-in-alifetime event actually may take place twice in some folks’ lives.
When Jonathan Swift proposed, in 1729, that the people of Ireland eat their children, he insisted it would solve three problems at once: feed the hungry masses, reduce the population during a severe depression, and stimulate the restaurant business.
Once you have worthy opponents, set some ground rules so everyone understands responsibilities and boundaries.
Once the essay was flawless, she would take an evening to walk me through my errors.
Nearly two-thirds of us grab fast food once a week, and we get almost 25% of our daily calories from snacks.
Franz Kafka once said: Writing is utter solitude ( ' , 独处 ), the descent into the cold abyss ( ' , 深渊 ) of oneself.
Once, just after I returned from my year in Vienna, I was asked to translate for a German judge at an Olympiclevel horse event.
Once across, the ropes were tied down and wooden bridges were hung from them.
He had a terrible temper, and once threatened to kill another child.
they are not reused once a new edition comes out
All computers do is fetch and work with numbers, he once explained, but do it fast enough and "the results appear to be magic".
And most noticeable of all, there is the phenomenon of large urban and suburban high schools that have split up into smaller units of a few hundred, generally housed in the same grounds that once boasted thousands of students all marching to the same band.
I say you only live once and we work hard and what's the point if you can't go on holiday.
We can get a lot of our ingredients once a week from the UK," Tamlyn explains.
Tamlyn says that besides importing ingredients from Britain once a week, his restaurant also buys vegetables from the local markets
it takes a long time to restore nature once damaged
Once she lost a two-cent stamp and spent the night looking for it.
Get key information by reading just once or twice
Why did Donna go back to Brazil once again?
Finally, on June 7, McLaughlin once again demonstrated his carelessness by knocking down several mailboxes near the edge of the company's parking lot
But it's no longer what it once was in the region.
So some of the values they teach may not be as important in the culture as they once were.
It cannot be fully restored once damaged.
The British traveler Charles Thompson spoke for many Grand Tourists when in 1744 he described himself as being impatiently desirous of viewing a country so famous in history, a country which once gave laws to the world, and which is at present the greatest school of music and painting, contains the noblest productions of sculpture and architecture, and is filled with cabinets of rarities, and collections of all kinds of historical relics.
The elevation of the room that once belonged only to the servants to that of design showcase for the modem family tells the story of a century of social change.
That falls far short of the billions of dollars people once expected it to generate.
Parents are concerned that their children may get involved in criminal offences once they reach their teens.
No wonder parents worry their own kids might spin out of control once they hit the turbulent waters of adolescence.
It had, apparently, been fished out of existence; and the once mighty Newfoundland fleet now gropes about frantically for crab on the sea floor.
About once a week, I have a client that will bring up a new certification I've never even heard of and I'm in this industry, said Kevin Wilhelm, chief executive officer of Sustainable Business Consulting.
Putting in effect the policies in the agreement at once.
Perlow calls this vicious cycle the cycle of responsiveness: Once bosses and colleagues experience an employee's increased responsiveness, they increase their demands on the employee's time.
Consumers are becoming increasingly bored with what companies have to offer: A survey of 28,000 consumers in 28 countries released by Accenture found consumers are not as excited about technology as they once were.
Stacy is going to walk you through the step-by-step process of becoming a social worker and Mill will tell you about the range of options you have once you get your social work degree, as well as the high standards of responsibility the social workers must adhere to.
that is, once you build it up, it has to go somewhere.
Unfortunately for them ( ' , and often the taxpayers), our energy systems are a bit like an aircraft carrier: they are unbelievably expensive, they are built to last for a very long time, they have a huge amount of inertia ( ' , meaning it takes a lot of energy to set them moving), and they have a lot of momentum once they are set in motion.
So a heavy object, like a football player moving at a high speed, has a lot of momentum — that is, once be is moving, it is hard to change his state of motion.
Once you have started the boulder rolling, it develops momentum, which is defined by its mass and velocity.
Now, she attributes much of her understanding of college to that: But once I got to campus, it was a completely different ball game that no one really prepared me for.
By sanctioning this watered-down version of college, universities are catering to the social and educational needs of wealthy students at the expense of others who won't enjoy the financial backing or social connections of richer students once they graduate.
An avalanche once closed the path, killing 63 people.
2018年高考英语全国卷3 阅读理解 阅读B 原文
As I watch her chase after a squirrel, throwing her whole being into the here-and-now of an exercise that has never once ended in victory.
2015年高考英语浙江卷 阅读理解 阅读D 原文
As Tolstoy once said, "one can live magnificently in this world if one knows how to work and how to love, to work for the person one loves and to love one's work."
2016年高考英语天津卷 阅读理解 阅读C 原文
As you may know already, it's a required meeting once a week.
2017年高考英语全国卷2 听力 原文
At that moment, I remembered that my father once said, " the classroom is a place for learning and that include leaning from textbooks, and mistake as well."
2018年高考英语全国卷3 语法填空 原文
Athens was not in the farthest background of his mind, but once man has a great and good idea, it is never completely lost.
2015年高考英语江苏卷 阅读理解 阅读D 原文
But once I started, I simply couldn't put it down.
2014年高考英语全国卷1 听力 原文
Gray wolves once were seen here and there in the Yellowstone area and much of the continental united states, but they were gradually displaced by human development.
2017年高考英语全国卷3 阅读理解 阅读C 原文
Guests staying at plaza hotel will be given meal tickets worth $36 once they have produced 10 watt hours of electricity.
2016年高考英语浙江卷（10月） 阅读理解 阅读B 原文
He hurried home, never once looking back to see if he was being followed.
2017年高考英语江苏卷 单项填空 原文
He was just saying: "I'm king of this forest, and here is your reminder! " Once his message was delivered, he allowed me to stay and watch.
2018年高考英语全国卷3 语法填空 原文
Holker once again opens is gardens in aid of the disadvantaged.
2018年高考英语全国卷3 阅读理解 阅读A 原文
However, once I worked with statewide and local government, I realized that a better fit for me would be public policy, and now I am in the process of changing my area.
2016年高考英语浙江卷（6月） 阅读理解 七选五 原文
I became out of breath and the once injured ankle hurt badly.
2018年高考英语北京卷 阅读理解 阅读A 原文
I believe you will have a wonderful time here once you get to know everyone else.
2015年高考英语陕西卷 单项填空 原文
I come here once a week, mostly Friday or Saturday.
2015年高考英语湖南卷 听力 原文
I once wrote a paper on the influence of fairy tales on Roald Dahl's writing and it gave me a new appreciation for his strange and delightful words.
2019年高考英语全国卷2 阅读理解 阅读A 原文
I saw a dark future for my once sweet daughter.
2015年高考英语重庆卷 完形填空 A 原文
I still remember visiting a friend who'd lived here for five years and I was shocked when I learnt she hadn't cooked once in all that time.
2018年高考英语浙江卷 语法填空 原文
If you have any doubts about your health, you'd better consult your doctor at once.
2015年高考英语天津卷 单项填空 原文
In a fire drill, the students should shut the door and leave at once.
2018年高考英语天津卷 阅读理解 阅读A 题设
It cannot be discovered once for all.
2015年高考英语江苏卷 阅读理解 阅读D 原文
It was carried out once a year.
2015年高考英语湖南卷 阅读理解 阅读C 选项
It was once common to regard Britain as a society with class distinction.
2015年高考英语广东卷 阅读理解 阅读D 原文
Lorry Chang goes to the Snoopy Café about once a week.
2015年高考英语上海卷 听力 原文
Many westerners who/that come to China cook much less than in their own countries once they realize how cheap it can be to eat out.
2018年高考英语浙江卷 语法填空 原文
Measles, which once killed 450 children each year and disabled even more, was nearly wiped out in the united states 14 years ago by the universal use of the MMR vaccine.
2017年高考英语北京卷 阅读理解 阅读C 原文
Miss Longfield added: "Then there is this push to connect—if you go offline, will you miss something, will you miss out, will you show that you don't care about those people you are following, all of those come together in a huge way at once."
2018年高考英语江苏卷 阅读理解 阅读D 原文
My dad never once said, "if you want to catch a fish you need to think like a fisherman."
2015年高考英语广东卷 阅读理解 阅读B 原文
Nasa is worried about two things: recovery time once astronauts return home, and, more importantly, how to maintain strength and fitness for the two and a half years or more that it would take to make a round-trip to mars.
2015年高考英语湖北卷 阅读理解 阅读D 原文
News of the first kind pays its rewards at once.
2015年高考英语江苏卷 任务型阅读 原文
No matter how attractive they look in the store, once I get them home they're unfailingly dry, hard, and tasteless.
2015年高考英语全国卷1 阅读理解 阅读B 原文
Normally at least once a week, but she's now a volunteer teacher at a mountain village in Africa.
2017年高考英语浙江卷（11月） 听力 原文
Once called the garden of Amsterdam, it still attracts travelers to come over to cycle and walk through the surrounding forests.
2015年高考英语湖北卷 阅读理解 阅读C 原文
Once fire and emergency people arrive, Larry and the other man backed off and let them go to work.
2016年高考英语全国卷1 完形填空 原文
Once I had a boy who worked experimentally with tinkertoys in his free time.
2016年高考英语全国卷2 阅读理解 阅读B 原文
Once lighthouses had telephones, keepers would call each other to warn that the inspector was approaching.
2015年高考英语湖南卷 阅读理解 阅读C 原文
Once that happened, I just kept pushing my studying further and further back in my day.
2018年高考英语浙江卷 完形填空 原文
Once the damage is done, it will take many years for the farmland to recover.
2015年高考英语北京卷 单项填空 原文
Once they arrive, the tables are turned.
2017年高考英语全国卷2 阅读理解 阅读D 原文
Once we have a common interest, a friendship can begin.
2015年高考英语安徽卷 任务型读写 原文
Once when I was facing a decision that involved high risk, I went to a friend.
2015年高考英语天津卷 阅读理解 阅读D 原文
Once when she was facing away, I reached out and carefully scratched her back with my finger, she didn't move.
2015年高考英语四川卷 完形填空 原文
Once you have reached a thousand dollars, you'll find you probably have the motivation to continue to save even more.
2016年高考英语上海卷 听力 原文
Once, a passenger next to me talked out loud on his mobile phone.
2015年高考英语重庆卷 阅读理解 阅读C 原文
Once, after a trip to Hollywood, I returned to Australia so depressed and spent months in my bedroom painting, listening to Eckhart Tolle's music and trying to find myself again.
2017年高考英语天津卷 阅读表达 原文
Once, while working overnight at a store, he let a homeless man sleep in his truck.
2017年高考英语全国卷2 完形填空 原文
Our generation once joined hands and stood firm at times of national emergency.
2016年高考英语北京卷 阅读理解 阅读D 原文
Passenger pigeons once flew over much of the united states in unbelievable numbers.
2014年高考英语全国卷1 阅读理解 阅读B 原文
Prevention is key, scientists says because once ecosystems pass their tipping point, it is remarkably difficult for them to return.
2019年高考英语天津卷 阅读理解 阅读C 原文
Once I look up something on the Internet, I don't need to keep all the details for future use—I know where to find that information again and can quickly and easily do so.
2016年高考英语江苏卷 阅读理解 阅读D 原文
The obvious one is money: eating out once or twice a week may be affordable but doing this most days adds up.
2018年高考英语浙江卷 语法填空 原文
The story once again tells us that one good turn deserves another.
2018年高考英语北京卷 完形填空 原文
Their wings can bridge the gap between lines, resulting in electrocution if they touch two lines at once.
2016年高考英语北京卷 阅读理解 阅读C 原文
These results, once again, lead to concrete advice: "once an individual begins volunteering, continued efforts might focus on developing a volunteer role identity.
2015年高考英语江苏卷 阅读理解 阅读C 原文
TV Ears is so comfortable that Jack forgets he has them on ! he can once again hear and understand the dialogue.
2015年高考英语北京卷 阅读理解 阅读B 原文
We do give you on the job training, once every month during normal hours.
2016年高考英语北京卷 听力 原文
When I was 17, I read a magazine article about a museum called the mcnay, once the home of a watercolorist named marian mcnay.
2018年高考英语天津卷 阅读理解 阅读B 原文
With 500 years of history, Hampton Court was once the home of four kings and one queen.
2015年高考英语全国卷2 阅读理解 阅读D 原文
Yet, now that I'm growing and the world I once knew as being so simple is becoming more complex, I find myself needing a way to escape.
2019年高考英语天津卷 阅读理解 阅读B 原文
But don't bother trying to kill off old habits; once those ruts of procedure are worn into the hippocampus, they're there to stay.
To read such books today is to marvel at the fact that their learned contents were once deemed suitable for publication in general-circulation dailies.
Rage Against the Haze failed once state funding was cut.
Once a discovery claim becomes public, the discoverer receives intellectual credit.
Nobel Laureate and physiologist Albert Azent-Gyorgyi once described discovery as “seeing what everybody has seen and thinking what nobody has thought.”
Sadly, the spirit of inquiry once at home on campus has been replaced by the use of the humanities and social sciences as vehicles for publicizing “progressive,” or left- liberal propaganda.
King Juan Carlos of Spain once insisted “kings don’t abdicate, they dare in their sleep.
Buy all your clothes once with a stylist instead of shopping alone, one article of clothing at a time.
Kennedy once said that a country’s GDP measures “everything except that which makes life worthwhile.”
A small but vocal group of Hawaiians and environments have long viewed their presence as disrespect for sacred land and a painful reminder of the occupation of what was once a sovereign nation.
By the time Shakespeare was twenty-five, Lyly, Peele, and Greene had made comedies that were at once popular and literary; Kyd had written a tragedy that crowded the pit; and Marlowe had brought poetry and genius to triumph on the common stage - where they had played no part since the death of Euripides.
Winston Churchill once walked its corridors and Japanese emissaries met here with Secretary of State Cordell Hull after the bombing of Pearl Harbor.
1. belonging to some prior time;
"our former glory"
"the once capital of the state"
"her quondam lover"
1. on one occasion;
"once I ran into her"
2. as soon as;
"once we are home, we can rest"
3. at a previous time;
"once he loved her"
"her erstwhile writing"
lone 孤独的, 独立的
only 唯一的, 单独的
someone 有人, 某人
loneliness 孤独, 寂寞
once 一次, 从前, 曾经
oneself 自己, 亲自
all at once
without warning; suddenly
all at once the noise stopped.
all at the same time
a lot of beans are ready all at once.
for once (或this once)
on this occasion only, as an exception
I hope you'll forgive me this once.
once a ——, always a ——
(proverb)a person cannot change their fundamental nature
once a whinger, always a whinger.
once again (或more)
one more time
once and for all (或once for all)
now and for the last time; finally
once and future
denoting someone or something that is eternal, enduring, or constant
side two contains four once and future hit singles.
once bitten, twice shy
side two contains four once and future hit singles.
once (或every once) in a while
from time to time; occasionally
once or twice
a few times
once upon a time
at some time in the past (used as a conventional opening of a story)
All at one time; simultaneously
Everything happened at once. The view of the skyline is at once awesome, grand, and disappointing.
Leave the room at once.
直流冷却水系统 once-through cooling water system 直流水系统 once-through water system
抛弃法烟气脱硫 once-through FGD process 直流锅炉 once-through boiler
- once in a blue moon
I do this only once in a blue moon.
Once in a blue moon I have a little wine with dinner.
- once in a blue moon