Despite a doubling of its gross domestic product in the past five years, Sri Lanka still requires foreign aid and loans.

VOA: standard.2009.11.09

We've seen almost a doubling in the price of the average home in the United States.

我们看到美国平均房价,几乎翻了一翻

耶鲁公开课 - 金融市场课程节选

But they can't deal with a tripling, even more than a doubling of rent.

但他们没办法承受三倍的租金，甚至无法承受多于两倍的租金。

纽约的负面变化 - SpeakingMax英语口语达人

Farmlink works with 125 local farmers with the aim of doubling pepper production over the next five years.

VOA: standard.2009.04.16

Now, in any society changing this much, this fast, doubling its own population--doubling--in twenty-five years.

现在,在任何变化如此巨大的社会,如此迅速地,在二十五年内,人口增至两倍

耶鲁公开课 - 美国内战与重建课程节选

Today 18 million tourists visit Venice every year, but in 20 years this number risks doubling.

VOA: standard.2009.10.27

Some will be growing very rapidly, some will be growing less rapidly, and what this equation shows you here or that rate of growth the to the doubling time of cells.

有些会生长得更快些,有的慢一些,而这个方程告诉你,即生长的速率和细胞倍增的时间联系起来

耶鲁公开课 - 生物医学工程探索课程节选

Since the collapse of the Soviet Union in 1991, and central Europe have become NATO members, almost doubling the alliance's number of countries from 15 to 28.

VOA: standard.2009.09.04

But actually there is a little bit of an energy cost into doubling up into a single orbital, because, of course, it takes energy when you create more electron repulsion, that's not something we want to do, but we have to do it here, and it turns out that that effect predominates over, again, the energy that we gain by increasing the atomic number by one.

但实际上，在一个轨道上放两个电子,确实会亏损一点能量，因为，当你加入更多电子，引起更大的排斥能,这显然会消耗能量，这不是我们想要做的，但是在这种情况下我们不得不做，结果这一影响，超过了增加一个,原子序数所得到的能量。

麻省理工公开课 - 化学原理课程节选

European skepticism about the vaccine comes as the Stockholm-based European Center for Disease Control and Prevention reports the number of deaths in Europe due to the H1N1 virus has been doubling every two weeks since mid-October.

VOA: standard.2009.11.25

So more than doubling the risk can certainly site to the population Now these kind of results show how important it is to do studies that don't group everybody in the population together.

由图可见,发病率差异量超过一倍,这些研究结果表明,在研究过程中分组的重要性

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Shortly afterward, officials made public that the support troops would number up to 13,000, bringing the overall total to 68,000 by the end of the year a doubling of the deployment from when he took office.

VOA: standard.2009.10.13

I--We were going D G B G B so as long as the notes have the same names or it sounds the same, even though there may be octave doubling in there we still think of that as monophonic texture.

我,我们只要,D G B G B,只要各个音的音名一样或听起来一样,尽管其中有双八度音,我们仍把它作为做单音织体

耶鲁公开课 - 聆听音乐课程节选

The general has not made a specific troop request, but experts say he could ask for as many as 40,000,maybe more, on top of the doubling of U.S.troop strength to 68,000 in the past year.

VOA: standard.2009.09.22

The expected life spans increased dramatically in the last couple of hundred years until now, for people that were born when you were born you can expect to live to be 80 years old, a doubling in life span, fairly dramatic.

从几百年前到现在,预期寿命显著增长了,你们同期出生的那批人,能够活到八十岁,预期寿命增长了一倍,令人印象深刻

耶鲁公开课 - 生物医学工程探索课程节选

If you start with only one, you have two pieces of DNA, then you'll get 2 to the Nth fragments after N cycles because each cycle you're doubling the number.

如果你从仅仅一个DNA开始,你有两条DNA链,经过N次循环后,就得到二的N次方个DNA片段,因为每次循环都使其数量翻倍

耶鲁公开课 - 生物医学工程探索课程节选