"They have the longest lifespan in the world, the lowest incidence of obesity, heart disease and diabetes."

VOA: standard.2010.02.23

You can think, " look, "the average lifespan in the United States " is whatever it is, 82 years.

你可以说，“美国人的平均寿命,“是82岁。

耶鲁公开课 - 死亡课程节选

Well, we might say, let's look at it from two basic perspectives, those who get less than the average lifespan and those who get more than the average lifespan.

我们可能会说，我们从两个基本角度来看，即那些活得比平均寿命短的,还有那些活得比平均寿命长的。

耶鲁公开课 - 死亡课程节选

"The average lifespan of the metal joints is about 10 to 15 years."

VOA: standard.2010.08.11

In this study, the research team developed a new statistical way of analyzing the genetic code of people who had reached age 100 as compared with people who had a more typical lifespan.

VOA: standard.2010.07.14