The researchers found a 14-year difference in life expectancy between Asian-American and African-American men who can expect to live an average of 67 years.

VOA: standard.2010.04.08

Back in the 1840s, life insurance was very important because the average expectancy of life was only something like forty-five years, so that meant parents were dying left and right.

在19世纪40年代的时候,寿险是非常重要的,因为当时的人均期望寿命,仅为45岁左右,这意味着双亲平均只能活到45岁

耶鲁公开课 - 金融市场课程节选

Back in the 1840s, life insurance was very important because the average expectancy of life was only something like forty-five years, so that meant parents were dying left and right.

在19世纪40年代的时候,寿险是非常重要的,因为当时的人均期望寿命,仅为45岁左右,这意味着双亲平均只能活到45岁

耶鲁公开课 - 金融市场课程节选