" ...such as relatively low levels of malaria risk to start with, political stability, a good health system and low levels of population movement bringing in infections from elsewhere."
VOA: special.2010.11.03
Subprime refers to mortgages, which is not the subject of today's lecture, but a subprime mortgage is a mortgage issued to a borrower who is not considered prime--not a good risk.
次贷指的是次级抵押贷款,这不属于今天的讨论范围之内,次级抵押贷款是发放给特殊借款人的,他们不是优质客户,也就是说风险较大
So, it's not really good enough to just have some risk of death-- it's got to be greater risk than usual.
所以,只冒某些死亡的风险,是不够的-,必须是比通常情况下更大的风险。
For any given level of return, you can reduce the risk; for any given level of risk, you can increase the return; sounds pretty good.
给定回报率,可以降低风险,给定风险水平,可以提高回报率,听上去不错
Psychologists for decades had very good intentions about helping at risk population.
数十年来的心理学家都有很好的意愿,想帮助高危人群。
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
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