For example,it says climate change and land use are expected to increase desertification worldwide, increasing the risk of sand and dust storms.

VOA: standard.2009.03.23

That's what this whole theory is about, how to get a lot of expected return without getting a lot of risk.

整个金融理论的中心,就是如何获得高收益,同时降低风险

耶鲁公开课 - 金融市场课程节选

In fact, different people might make different choices about how much risk they're willing to bear to get a higher expected return.

事实上，为了获得高的预期收益率,人们愿意承受的风险,也会不同。

耶鲁公开课 - 金融市场课程节选

It would be anywhere from here to here, depending on how much you're afraid of risk and how much you want expected return.

可以选择从这里到这里的任意一点，取决于你对风险的承受能力,和你的期望回报。

耶鲁公开课 - 金融市场课程节选

Expected value is good and variance is bad because that's risk; that's uncertainty.

期望值越高越好,方差就相反,因为方差代表着风险,也就是不确定性

耶鲁公开课 - 金融市场课程节选