life ex·pec·tan·cy
noun/ˈlaɪf ɪkspektənsi/
/ˈlaɪf ɪkspektənsi/
(also less frequent life expectation)
[uncountable, countable] (North American English also expectation of life [uncountable])
- the number of years that a person is likely to live; the length of time that something is likely to exist or continue for
预期寿命；预计存在（或持续）的期限 - Life expectancy for both men and women has improved greatly in the past 20 years.
过去 20 年来，男性和女性的预期寿命都有了很大提高。 - Women have a longer life expectancy than men.
女人的预期寿命比男人长。 - The life expectancy of a large bus is about 15 years.
大型客车的预期寿命约为15年。 - Japanese people have a very high life expectancy.
日本人的预期寿命非常长。
- Life expectancy for both men and women has improved greatly in the past 20 years.