A mortgage lender doesn't want to lend more than the property is worth because that would mean a loan-to-value ratio over one.

抵押贷款的贷方,借给你的钱不会超过财产本身价值,因此贷款价值比率就会大于1

耶鲁公开课 - 金融市场课程节选

Another important concept in probability theory that we will use a lot is expected value, the mean, or average-- those are all roughly interchangeable concepts.

概率论中另外一个常用的重要的概念是,期望值或者也叫均值,这两个概念可以互换

耶鲁公开课 - 金融市场课程节选