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Discover LudwigThe phrase "average longevity" is correct and can be used in written English.
It can be used to describe the expected life span of something or someone, usually in comparison to the life spans of similar things or people. For example, "The average longevity of a fruit fly is only about 30 days."
Exact(29)
The average longevity of those born since 2009 is 78.7 for a boy and 82.6 for a girl.
Compared with people in thirty-six other industrialized countries, it showed, Americans rank twenty-eighth in average longevity — just above the Irish and the Cypriots (the Japanese top the rankings).
Information on families' religious, educational, professional and political inclinations, the average longevity of their members, their proneness to suicide and divorce and so forth, must shed some explanatory light on the personalities under genealogical scrutiny.
Indexing the age of eligibility for full benefits to improvements in average longevity would penalize the many workers who for various reasons must retire before reaching the full-benefits age.
Research published recently in the Lancet shows that by 2030 average longevity will be 85.7 years for men and 87.6 years for women – although there will still be a disgracefully large gap between the richest and poorest areas.
Adult average longevity was significantly higher for the control than the insecticides treatments.
Similar(31)
First, average longevities were quite low.
But those flies lived much longer, with average longevities of more than 20 days, and average A parameters of 0.0034 and 0.0054 in males and females, respectively.
While it might seem as if this requirement can be readily addressed simply by monitoring average longevities, this is in fact not the case.
In some respects, the experiment comparing B and O populations confirmed that our protocols were valid: average longevities and estimated Gompertz parameters were all strikingly different (see Figures 1 and 3), as observed in the earlier studies.
After trailing for six decades, New York City overtook the national average for longevity in 2000, and by 2004, the city led the nation by almost 10 months.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com