Because of longer life spans, Americans are also boosting their savings to preserve their nest eggs, the TD Ameritrade study showed, which surveyed 2,000 adults between 40 to 79.

德美利证券公司的该项研究调查了2000名40至79岁的成人，研究表明，由于寿命延长，美国人也在增加储蓄以留存养老储备金。

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So is there truth to the claim that shorter people have longer life spans?

矮个子寿命更长这种说法是否是事实呢？

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Longer life spans are one reason, along with an increasingly uncertain financial picture.

拥有更长的寿命是一个原因，与越来越不确定的金融前景也有关系。

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The survey credits the difference to women's longer life spans and lack of mates.

CNN: Sex after 60: You betcha, survey says

Companies that still offer pensions might have to kick in more money to account for longer life spans.

WSJ: Workers Saving Too Little to Retire

The effect of longer life spans on pension obligations has been dwarfed by the impact of declining interest rates over recent years.

WSJ: Workers Saving Too Little to Retire