He trebled his earnings in two years.
他在两年间收入增加了两倍。
Cases of food poisoning have trebled in the last two years.
在过去的两年里，食物中毒事件增加了两倍。
上个月，我的房租涨了两倍。
The newspaper's circulation has trebled since last year.
去年以来该报的发行量已增加到原来的叁倍。
Profits in our company have trebled in the last two years.
我们公司的利润在这两年中增长成以前的三倍。
By 2050, if nothing changes, that number will have trebled.
如果情况没有改变，那么到了2050年这个数字将会翻3倍。
Sales of earplugs have trebled due to the World Cup outside stadiums.
世界杯开赛以来，赛场外耳塞的销量增长了两倍。
But no one knows for sure why America's obesity has trebled since 1960.
但是没有人能确切的知道为何美国的肥胖率自1960年开始猛增了3倍。
The efficiency of these machines has been more than trebled or quadrupled.
这些机器的效率已提高了两倍或三倍多。
In rich countries the proportion of births outside marriage has trebled since 1980, to 33%.
在富裕国家，婚外生育比例是1980年的三倍，达到了33%。
In rich countries the proportion of births outside marriage has trebled since 1980, to 33%.
在发达国家，非婚生子占新生儿的比重比1980年高出了3倍，已经达到了33%。
Yes, prices have risen, but there was never a period when they doubled or trebled every month.
没错，物价上涨了，但是从来没有一个时期物价每月上涨两倍或者三倍。
Rio's have doubled in price since January and almost trebled from their low point late last year.
力拓的股价自一月来已翻番，而自去年的低点以来已几乎翻三倍。
Federal spending has increased hugely in recent years: it more than trebled between 2004 and 2008.
联邦支出最近几年巨幅增长：2004至2008年间，支出翻了3倍有余。
Its milk production trebled, to 103m tonnes, over a period when global milk output increased by half.
牛奶产量增加了两倍，达到1.03亿公吨，同时期全球牛奶产量增加了一半。
Borrowing from other forces, the number of officers on London's streets was almost trebled, to 16,000.
加上从其他地方借调来的警力，伦敦街头的警察数量大约是往常的三倍，达到了1.6万人。
The amount that American firms spend on research in computer services as much as trebled over the past decade.
在过去的十年中，美国企业在计算机服务业所投入的研发经费多达之前的三倍。
Over the past 50 years, as the world's population rose from 3 billion to 6.5 billion, water use roughly trebled.
过去50年中，世界人口从30亿飙升到65亿，用水量增加两倍。
Cases of primary liver cancer, an often preventable disease, have trebled in the last 30 years, figures suggest.
数据显示，原发性肝癌——一种可以预防的疾病，患病人数在过去30年间翻了三倍。
Over the past five years, however, the price of gold has trebled while the value of gold miners has merely doubled.
然而过去五年，黄金价格涨了三倍，但金矿公司市值只升了两倍。
Demand from Asian countries has certainly pushed up prices; non-oil commodities have trebled over the past decade.
亚洲市场的需求当然把价格推高了，非石油产品的价格过去十年翻了三倍。
He came within four points of the leader, Mr Romney, and has trebled his support since July, leaping from 8% to 24%.
他以4个点的弱势紧跟共和党领导人Romney先生。并且从7月以来他的支持率已经翻了两番，从8%跃到了24%。
The number of companies from Brazil, India, China or Russia on the Financial Times 500 list trebled in 2006-08 from 20 to 62.
在2006至2008年间，《金融时报》500强企业中来自巴西，印度，中国和俄罗斯的企业由20席上升到了62席。
Statewide unemployment, at 10.2%, has trebled since then, as bricklayers lay down their hods and tour guides doff their Mickey masks.
而州平均失业率，随着砖瓦匠放下他们的浆桶，旅游向导脱下他们的米奇面罩，也自06年上窜3倍达到10.2%。
The pest, whose nests have already trebled in the worst-affected areas in the south-east in recent years, will spread even more rapidly, they say.
近年来，在东南部收在最重的地区，栎列队蛾的巢穴已经增加了两倍，专家称，其扩散速度仍在加快。
The average age is 35, but the number of 40 to 50-year-olds seeking treatment has almost trebled in a decade, with nearly 5,000 women in this age group trying for a baby.
近十年中接受治疗的女性平均年龄为35岁，但其中40到50岁女性最多，大约有5,000左右试图通过这个治疗怀孕。
The average age is 35, but the number of 40 to 50-year-olds seeking treatment has almost trebled in a decade, with nearly 5,000 women in this age group trying for a baby.
近十年中接受治疗的女性平均年龄为35岁，但其中40到50岁女性最多，大约有5,000左右试图通过这个治疗怀孕。
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