In the developed world, the very old (age 80 +) is the fastest growing population group.

在发达国家，老年人(年龄80以上)是增长最快的人口群体。

youdao

The health of prisoners is among the poorest of any population group and the apparent inequalities pose both a challenge and an opportunity for country health systems.

囚犯的健康是任何群体中健康情况最差的，这种明显的不平等现象对国家卫生系统既是挑战又是机遇。

youdao

Clear focus on a population group vulnerable to HIV.

重点针对艾滋病易感的一个人群。

youdao

The nonprofit group Population Services International and its partner Association de Sante Familiale launched the service in two thousand five.

VOA: special.2010.05.03

What this does, when you use relative risk you take some group of the population and you establish their risk as--at one.

当运用相对危险度这个概念时,要选定一个群组,并把这个群组的风险设为1

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So more than doubling the risk can certainly site to the population Now these kind of results show how important it is to do studies that don't group everybody in the population together.

由图可见,发病率差异量超过一倍,这些研究结果表明,在研究过程中分组的重要性

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Genes change slowly, over many generations, while the diversity of phonemes amid a population group can change rapidly as language evolves.

WSJ: Study Points to a Single, Original Language for All Humans

Mr. FRASCA: Well, that's not the infection rate among that population group.

NPR: HIV Concerns for Many Mississippi Latinos

Overall, the illiteracy rate in the young and middle-aged population group has fallen from over 80 per cent down to about 5 per cent.

UNESCO: Community Learning Centres (CLC) Programme