The average life expectancy was 40.

平均期望寿命曾是40岁。

《柯林斯英汉双解大词典》

In 2007 the average life expectancy at birth was 78 years.

2007年，初生婴儿平均预期寿命为78岁，这种进步已经持续数十年。

youdao

Scandinavia's citizens also live long lives, with average life expectancy of 79.

斯堪的纳维亚地区的居民寿命也更长，平均寿命为79岁。

youdao

Average life expectancy for Americans is 78.

VOA: standard.2010.04.08

Back in the 1840s, life insurance was very important because the average expectancy of life was only something like forty-five years, so that meant parents were dying left and right.

在19世纪40年代的时候,寿险是非常重要的,因为当时的人均期望寿命,仅为45岁左右,这意味着双亲平均只能活到45岁

耶鲁公开课 - 金融市场课程节选

The researchers found a 14-year difference in life expectancy between Asian-American and African-American men who can expect to live an average of 67 years.

VOA: standard.2010.04.08

At a time when average life expectancy was 47, few lived long enough to get cancer.

WSJ: Cancer Society hits 100 as US cancer rate falls

The European Health Report also reveals big inequalities in average life expectancy between different countries.

BBC: European men lag behind in life expectancy

When America brought in its Social Security system in 1935, average life expectancy was only 62.

ECONOMIST: The gods that have failed��so far