Some of the surveys included only college students; others were done with a mixed-age population.

有些调查只包括了大学生群体；其他的则针对各个年龄段的人群。

youdao

That is about 3% of the school-age population.

这大约是学龄人口的3%。

youdao

The crux is in the working-age population, aged 15-64.

问题的症结在于处于工作年龄，即15岁到64岁之间的人口数量。

youdao

Alzheimer's is usually not found in the general population until people are over the age of sixty-five.

VOA: special.2009.09.09

From the point of view of the school age of youngsters' population, there are really, I think, two implicit purposes.

从青少年的,学龄角度考虑，我想存在两个深层目标。

麻省理工公开课 - 媒体、教育、市场课程节选

It's an invention of a barbarous age which a blind and ignorant population will accept only to its own vexation, hindrance, and constraint.

它是只有蛮荒时代愚昧无知的人们才会接受,以自寻烦恼，阻碍，和限制的。

耶鲁公开课 - 弥尔顿课程节选

Only 29% of the voting-age population bothered to vote at the last gubernatorial election.

ECONOMIST: A joke-spinning candidate with serious consequences

The red line is the percentage of the working-age population in the labor force.

FORBES: Predictions Of The Gold-Silver Ratio

And get this, Japan is expected to lose 40% of its working age population by 2050.

FORBES: The World Economy Is Turning Japanese, I Really Think So