While we are happy about the increase in our life expectancy, it has also resulted in a rapid increase of the elderly population.

我们为人民预期寿命的提高感到高兴，但这也带来了老年人口迅速增长的问题。

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The European Happy Planet Index used carbon efficiency, life satisfaction and life expectancy to rate the countries.

此项“欧洲快乐星球指数”主要是综合碳效率、人民的生活满意度及预期寿命三个指标对这些国家（country）进行评分成。

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All in all, daily intake of omega three should raise your life expectancy significantly and make you feel happy, pappy and much less wacky, which can "t be bad."

总而言之，每天摄入欧米加3可以大大延长寿命，使你开心，浑身舒畅，觉得正常，总之感觉并不赖。

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And at 74, Cheeta has exceeded the average life expectancy for a chimpanzee in captivity by nearly a quarter-century, which makes this a very happy birthday indeed.

NPR: Cheeta, Screen Star for the Ages