送交者: blackbox 于 2006-7-15, 08:13:23:
回答: 老杨好像没搞清楚life expectancy的概念 由 老中一号 于 2006-7-14, 18:35:12:
from the sum of ALY devided by the total number of population who reached age 84. The result of 6 is possible, although I did not check the published Life Table for the US population