The U.N.World Food Program says more than a billion people one in six worldwide do not get enough food to be healthy.

VOA: special.2009.11.23

So, the optimal thing to do if you live in a world like this n is to get n as large possible and you can reduce the standard deviation of the portfolio very much and there's no cost in terms of expected return.

如果现实中也这样简单的话,那么你就尽量增大,这样就能让投资组合的标准差,就会大大降低,从预期收益率的角度来看,这样做的成本是零。

耶鲁公开课 - 金融市场课程节选

In this simple world, n or whatever you could.

在这个简单的假设中，取100或者1000，you'd，want，to，make，n，100，or，1，000,任意数值都可以。

耶鲁公开课 - 金融市场课程节选

But he says the United States can't solve the world's problems alone and it is time for all U.N.

VOA: standard.2009.09.23

Reports from the region have suggested the staff members worked for the World Food Program and the U.N.Development Program.

VOA: standard.2009.03.16

The U.N.World Food Program says none of its trucks were damaged nor any of its personnel injured and the rations were delivered.

VOA: standard.2009.09.12

That frustrated U.S.President Barack Obama and other world leaders' efforts to forge an international climate agreement at a U.N.summit in Copenhagen last December.

VOA: standard.2010.08.03

The U.N.Secretary-General, Ban Ki-moon is in Geneva for the opening of the World Telecom Conference.

VOA: standard.2009.10.05

And in London, the U.N.Secretary General said world leaders are not likely to agree to a new climate change pact at the December summit in Copenhagen.

VOA: standard.2009.11.04

The U.N.report says the world's economy is beginning to show signs of modest recovery.

VOA: standard.2010.01.21

Iran's president also defended statements he made last Monday before a U.N.conference in which he called Israel the most cruel and racist regime in the world.

VOA: standard.2009.04.26

The United States as host country of the United Nations, the United States is obligated by treaty to allow Mr.Gadhafi and other world leaders to attend U.N.activities.

VOA: standard.2009.08.24

The alarming prediction that the Himalayan glaciers are receding faster than those in any part of the world was made in a 2007 report by the U.N.'s Intergovernmental Panel on Climate Change.

VOA: standard.2010.01.23

The U.N.World Food Program says it needs $500,000 to bring 250 metric tons of food to Birao next month because supplies that were pre-positioned earlier in the year are not sufficient to meet greater demand.

VOA: standard.2009.08.27

The U.N.chief said his role would be as an advocate for the world's poorest people, who he fears will suffer the most if donor countries reduce their international assistance or do not fulfill their aid commitments.

VOA: standard.2009.03.25

The U.N.Fund for Population Activity and the World Health Organization are working with national ministries of health in a global campaign to end fistula that now covers more than 40 countries in Sub-Saharan Africa, Asia,and the Middle East.

VOA: standard.2009.12.23