Ron Wagner is from the Experimental Aircraft Association, which holds the event each year.

VOA: special.2010.07.30

I computed the returns on the stocks, bonds, and oil for every year from 1983 and I computed the average returns, which I take as the expected returns, I took the standard deviations, and I took the covariance.

我计算了从1983年以来每年的股票,债券和石油的收益，从而得出平均收益率，这些平均收益率作为预期收益率，然后算得标准差及协方差。

耶鲁公开课 - 金融市场课程节选

"The prices have come down to a real sweet spot of around which is down around 20 percent from last year,".

VOA: standard.2009.12.28

In Kabul,Clinton reaffirmed U.S.support for Afghanistan, which has suffered from its deadliest year for foreign troops and emerged from a fraud-ridden presidential election.

VOA: standard.2009.11.18

Mr.Orban has yet to unveil details on how he wants to finance his economic plans, which include reducing unemployment from a 17-year high.

VOA: standard.2010.05.29

between January the 1st and the 22nd May this year, a further 166,000 people had been expelled, which is actually an increase of 42 percent in the same period from last year."

VOA: standard.2009.09.13

We're talking about a vast number of trees that are taken out of forests every year, which are contributing to that one-fifth of global emissions that comes from deforestation and contributing to the loss of wildlife, contributing to the loss of people's livelihoods and contributing to the loss of revenue from governments."

VOA: standard.2010.07.28

But an even more astounding result for us from this survey, which encompassed 1,000 adults a random telephone survey in January of this year, was that over 800 of the respondents - that's over four out of five people - say they are still buying green products, still buying green products in a very severe recession."

VOA: standard.2009.03.30