fifty
英 [ˈfɪfti] 美 [ˈfɪfti]
num. 五十;五十岁;五十个人;五十年代;编号为五十的东西;五十个
n. 五十几;五十年代
adj. 许多的
复数： fifties
派生词： fiftieth 第五十（序数词） n.
拓展知识：
一、牛津词典中的解释：
1、number 五十；50
2、noun
the fifties [pl.] 五十几；五十年代
numbers, years or temperatures from 50 to 59
She was born in the fifties.
她是五十年代出生的。
【派生词】fiftieth （ordinal number；noun）
习语 in your fifties
50多岁 between the ages of 50 and 59
He retired in his fifties.
他在五十多岁时退休了。
二、柯林斯词典中的解释：
1、NUM (数字) 50
Fifty is the number 50.
2、N-PLURAL 五十几(指 50 到 59 之间的数字)
When you talk about the fifties, you are referring to numbers between 50 and 59. For example, if you are in your fifties, you are aged between 50 and 59. If the temperature is in the fifties, the temperature is between 50 and 59 degrees.
I probably look as if I'm in my fifties rather than my seventies.
我大概看上去像 50 多岁而不是 70 多岁。
3、N-PLURAL 二十世纪五十年代
The fifties is the decade between 1950 and 1959.
He began performing in the early fifties.
他20世纪50年代初开始从事表演。
三、英英释义：
noun
1、a United States bill worth 50 dollars
Synonym:fifty dollar bill
2、the cardinal number that is the product of ten and five
Synonym:50L
adj
1、being ten more than forty
Synonym:50l
四、双语例句：
1、Around fifty people die of hunger every day in the camp.
集中营里每天大约有五十人饿死。
2、To look at him you'd never think he was nearly fifty.
看他的外表，谁也想不到他年近五十了。
3、He's ancient ─ he must be at least fifty!
他老得很了——肯定至少有五十岁！
4、Students in fifty schools are to act as guinea pigs for these new teaching methods.
五十所学校的学生将作为这些新教学法的试验对象。
5、The ceremony was transmitted live by satellite to over fifty countries.
典礼通过卫星向五十多个国家进行了实况转播。
6、Fifty pounds is the best I can offer you.
我顶多出五十英镑。
7、I'd say he was about fifty.
我猜他五十岁上下。
8、Roughly speaking, we receive about fifty letters a week on the subject.
关于这个问题，粗略地说，我们每周能收到大约五十封来信。
9、This is his sunset tour after fifty years as a singer.
这是他五十年歌手生涯结束前最后一次巡回演出。
10、Fifty is the new forty.
四十尚未老，五十正当年。
11、You'll save fifty dollars, which can't be bad, can it?
你会省下五十元钱，这就够好了，对吧？
12、Put a fifty pence in the machine.
把一枚五十便士硬币投进机器。
13、There were over fifty applicants for the job.
有五十多人申请这个工作。
14、They served a wonderful meal to more than fifty delegates.
他们招待五十多位代表吃了一餐美味佳肴。
15、We have invited fifty people altogether.
我们共邀请了五十人。
16、And then there's the little matter of the fifty pounds you owe me.
还有件小事儿，你欠我五十英镑呢。
17、The house is set in fifty acres of parkland.
房子四周是五十英亩草地。
18、There was a sheer drop of fifty metres to the rocks below.
距下面的岩石有五十米的垂直距离。
19、I backed the winner and won fifty pounds.
我押对了赌注，赢了五十英镑。
20、She was born in the fifties.
她是五十年代出生的。
21、If he wins ─ and it's a big if ─ he'll be the first Englishman to win for fifty years.
假设他赢了——不过这还是个很大的疑问——他将成为五十年以来第一个获胜的英格兰人。
22、He retired in his fifties.
他在五十多岁时退休了。
23、Fifty per cent of road accidents result in head injuries
50%的道路交通事故都会导致头部损伤。
24、The floods are described as the worst in nearly fifty years.
这次洪灾据说是近50年来最为严重的。
25、During his career, he wrote more than fifty plays
在他的创作生涯中，他写下了50多部剧本。
26、They noticed fifty and twenty dollar bills floating in the water.
他们发现水中漂浮着50和20美元的纸币。
27、His age was hard to guess — he must have been nearing fifty
很难猜测他的年龄，他一定快50了。
28、Since taking up writing romance in 1967 she has brought out over fifty books.
自1967年开始写爱情小说起，她已经出了50多本书了。
29、That would probably cost you about fifty bucks
那大概要花掉你50美元左右。
30、The village is a settlement of just fifty houses.
这个村子里只住了50户人。
五、词根词缀：
后缀
-ty 表名词
1、用在形容词后，把形容词变成名词，“性质，情况，状态”
certainty n. 肯定
certain 肯定的 + ty 性质，情况，状态 → 肯定
cruelty n. 残酷
cruel 残酷的 + ty 性质，情况，状态 → 残酷
frailty n. 脆弱
frail 脆弱的 + ty 性质，情况，状态 → 脆弱
loyalty n. 忠诚
loyal 忠诚的 + ty 性质，情况，状态 → 忠诚
naivety n. 天真
naive 天真的 + ty 性质，情况，状态 → 天真
novelty n. 新奇
novel 新奇的 + ty 性质，情况，状态 → 新奇
2、“…十”
eighty num. 八十
fifty num. 五十
seventy num. 七十
sixty num. 六十
六、词语用例：
习语
n.in your fifties
50多岁
between the ages of 50 and 59
He retired in his fifties.
他在五十多岁时退休了。
50用英语表示：fifty
解析如下：
一、音标： 英 ['fɪfti] 美 ['fɪfti]
二、意思：
num. (数词)
五十
adj. (形容词)
五十的
五十个的
许多的
n. (名词)
五十年代
五十
五十个人
五十岁
三、词语搭配：
fifty pence 五十便士
fifty cents 五十美分
go fifty-fifty 平分, 分摊
fifty fifty 平分
excess fifty 余五十
fifty-moves rule 五十回合规则
excess fifty code 余50码
fifty-fifty 平分为二的
on a fifty-fifty basis 对等地
四、例句：
He fathered a daughter at the age of fifty.
他五十岁时生下一个女儿。
Black smog reduced visibility to about fifty yards.
黑色的烟雾使能见度降到大约五十码左右。
Forty or fifty women were sitting cross-legged on the ground
四五十个女人盘腿坐在地上。
50用英语表示：fifty
英 [ˈfɪftɪ]
n.五十;五十岁;
determiner.五十个的
pronoun.五十个人（或事物）
[例句]
He was summonsed, and fined fifty pounds.
他受到传讯，被罚款50英镑。
50用英语表示是fifty。
例外，30的英语是thirty，40的英语是forty。