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

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

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

This is on top of the 38,000 that are already there, taking into account a doubling over the past two years,".

VOA: standard.2009.12.03

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