人均壽命反映一個國家人民生活質量的好壞，其它都是浮雲。

來源: 於 2011-11-13 21:45:57 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

從人均壽命看，美國全世界排名第50位，的確是個二流發達國家

Life expectancy at birth is also a measure of overall quality of life in a country and summarizes the mortality at all ages.

https://www.cia.gov/library/publications/the-world-factbook/rankorder/2102rank.html