1The number equivalent to the product of five and ten; half of one hundred; 50.

只有50%的飞机还能用。

我们中间约有50人依次走了进去。

一条50磅重的大马哈鱼。

1. 1.1fifties The numbers from 50 to 59, especially the years of a century or of a person's life.
   五十到五十九之间；五十年代；五十到五十九岁时期
   Elvis is the icon of the Fifties

   埃尔维斯是50年代的偶像。

   Example sentencesExamples

   • The teacher she found was an older lady in her middle to late fifties, and she taught Chemistry
   • Later, at school in the fifties, G.K. Chesterton was very much in vogue.
   • This was in the early part of the 20th century, and from the fifties onwards that land became filled up with community facilities.
   • Every true icon of the last couple of centuries has smoked, from voluptuous fifties film stars to odd-looking French philosophers.
   • That teacher was Mr. Jeremy Wendell, and he was apparently in his middle to late fifties, as he had a great deal of gray in his hair now.
   • Now, alas, he is married and the nearest he gets to the fifties is his age - he's 45 and rising.
   • Back in the fifties and sixties I produced a mass of work, most of which seems to have disappeared.
   • Haynes' film then becomes a melancholy commentary on the bigotry and snobbery of fifties Middle America.
   • She was in her middle fifties and was about five foot six and wore little round spectacles that she kept around her neck by means of a chain, and like most of the people who lived in Linton she lived near her family.
   • David Ellis has been involved with horses since grammar school and the late fifties.
   • Very few men in their forties caught my eye but once in the fifties, they aged rapidly in comparison to their female counterparts.
   • To be sensitive in the fifties was, almost by definition, to be a reader.
   • The chief reporter was a grey haired man, middle fifties, rimless spectacles.
   • The older man grinned, a myriad of wrinkles submerging onto the weather tanned skin, exposing his real age of fifties.
   • Well into her fifties, and with half her face semi-paralysed from a stroke many years earlier, she looked serene, yet somehow triumphant at the same time.
   • And by then, it's too late to retool - the opportunity costs of going back to school in your fifties are huge.
   • Instead, the museum is concentrating on foundation figures who came of age in the fifties and sixties and on enriching its holdings of the work of certain especially favored artists.
   • Stephen who was in his middle fifties was working on a television aerial in the Aghamore area fell from the roof of a two storey house, he was rushed to Castlebar hospital but died a short time later.
   • The man, aged in his fifties, was shot in his car by bandits who tried to rob him after a visit to an automatic teller machine.
   • Luckily the fifties were good productive years in terms of the financial return on wool and meat, just as the war years had been for many farmers.
2. 1.2 Fifty years old.
   五十岁
   she looked about fifty

   她看上去约50岁。

   Example sentencesExamples

   • She was relieved to see Michael entering the room with another man, who looked about fifty years of age, following close behind.
   • Does it work when a staff is comprised of counselors ages fifteen through fifty?
   • The men looked, on the whole, to be above fifty years of age, or in one or two cases, even older, whilst most of the women looked considerably younger.
   • People over the age of fifty have the highest risk of severe disease.
   • It is estimated that by the year 2008, women between the ages of fifty and sixty-five will be the largest demographic group in the United States.
   • By the age of fifty, most of us are haunted by ghosts.
   • Of those aged fifty to fifty-nine, 39 per cent agreed, and 40 per cent of those over sixty.
   • The over forty age category last year included three women aged fifty or over, compared to just one birth in this age group in 1999.
   • Their ages range between fifty to eighty-three.
   • He says that being close to fifty years of age, it is very difficult to find work.
   • It was untitled apart from saying that the person photographed was now fifty years of age.
   • Worse, he told me the average age was about fifty.
   • They range in age from twenty-five to fifty, and most consider themselves to be politically independent.
   • The dread didn't sink in until I realised I was probably the youngest person in the theatre, with the mean age being about fifty.
   • It's an examination of Roosevelt's years after he left the presidency at the age of fifty.
   • Sherlock Holmes is often thought of as ‘immortal’, and James Bond is still going strong at about fifty years of age.
   • He passed the age of fifty during his stay at Ann Arbor, but there was little if any slowing down; about half of his published papers appeared after that time.
   • A proprietor had noted in 1910 that he had applications for jobs at twenty-five shillings a week from competent reporters of forty and fifty years of age with families.
   • You can imagine my utter disbelief then, when the cab turned up and turned out to be driven by a grey haired, short man of about fifty years of age.
   • Occasionally there might be mention of the need for men to undergo tests especially when they come to the fifty years of age mark.
3. 1.3 Fifty miles an hour.
   五十英里的时速
   I was doing about fifty

   以每小时约50英里的速度行驶。

   Example sentencesExamples

   • Elizabeth guessed that he was going at least forty or fifty miles per hour.
   • Sam asked, pealing out of the driveway at fifty miles an hour.
   • A drunk driver ran a red light and hit their car traveling twenty kilometers over the fifty kilometer speed limit.
   • I worked out that my average speed over those two months was fifty miles per hour the whole time.
   • Our speed had dropped down to fifty miles per hour.
   • Ash yelled, his wings buzzing at fifty miles an hour.
   • He estimated that his top running speed is about fifty miles per hour.
   • They also have extremely powerful hind legs, and can charge at up to fifty miles/hour.
   • The planes only had a top speed of fifty miles per hour and when hitting strong headwinds actually began to move backwards in mid-air.
   • This car was certainly not travelling at fifty miles per hour!
   • From the corner came her sister's red jeep probably going about fifty miles an hour.
   • Martin and I jumped out of the car, and I looked at the tornado, and estimated it to be just a mile away from us, and it was going fifty miles an hour.
   • Mina rolled the window back up and floored the accelerator, and they took off at fifty miles per hour.
   • Jason surpassed the speed limit in the city by fifty miles with Steven in the back seat holding me.
   • Cars passing the elementary school generally are already going about fifty miles per hour.
   • No hand, skillfully placed or not, is going to catch all the aerosol content of a fifty mile an hour cough.
4. 1.4 A size of garment or other merchandise denoted by fifty.
   （衣服等商品尺码的）五十号
5. 1.5 A fifty-pound note or fifty-dollar bill.
   五十英镑（或五十美元）的钞票
   Example sentencesExamples

   • Will pulled out a massive wad of notes - fifties - and started betting five times in a row on black, five on red.