Whereas older generations are sometimes reluctant to adopt new technologies, driverless cars promise real value to these age groups in particular.

老一代的人有时不愿意接受新科技，但无人驾驶汽车对这一年龄群体尤其有实际价值。

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In older age groups women predominate because men tend to die younger.

在年龄较大的人群中，女性占多数，因为男性的寿命倾向于短些。

《柯林斯英汉双解大词典》

The problem cuts across all socioeconomic lines and affects all age groups.

这个问题超越社会经济的所有界限，影响各个年龄段的人。

《柯林斯英汉双解大词典》

But experts say they are encouraged that the virus seems to be hitting hardest among people of middle age, sparing the more vulnerable groups - the elderly and children under the age of five.

VOA: standard.2009.04.28

Mr Clark is steely-eyed about marketing toys which slither sexily down into single-figure age-groups.

ECONOMIST: Toy industry

Yet progress has been slow: of the relevant age-groups, only 85%, at the latest count, were at primary school, 36% at secondary school, with fewer than 20% in higher education.

ECONOMIST: Sound curriculum: but can the Americas put it into effect?

That factor of 120 (12 times higher than 10 times the PTTI) alluded to by Dr Tongesayi is for children - most susceptible by virtue of age - among groups who eat rice more regularly than the average, such as Asians and Latinos.

BBC: US rice imports 'contain harmful levels of lead'