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This curious result occurs because people with shorter life expectancies tend not to purchase annuities .

出现这种奇怪的现象是因为预期生命较短的人不愿购买年金。

How do I build positive expectancies for success among my students .

我如何在学生中间树立积极的成功期望。

And as life expectancies increased , retirement benefits were extended .

随着平均寿命的增加，退休人员数量增多。

Despite the bleak picture for so many counties , a few have longer life expectancies than even the top 10 average .

尽管许多郡县居民的平均寿命都在缩短，但还是有一些郡县居民的平均寿命比世界前十名的平均寿命长。

The japanese boast among the highest life expectancies in the world but have extremely low birth rates .

日本虽然被认为是世界上最长寿的民族但是人口出生率却十分的低。