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。

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Average life expectancy in 1995 was 49 years; in 2003 it was 41 years.

平均期望寿命在1995年为49年；在2003年为41年。

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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

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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.

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