old population

The old population is a world mental state hygiene problem.

人口老龄化是世界性心理卫生问题。

Clock drawing test is used widely to study and test the cognitive deficits and the cognitive decline in old population and proved to be a useful screening tool for dementia patient.

钟面画测试被广泛用于研究和测试老年人群中的各种认知缺陷和认知老化，是一种有用的筛选老年痴呆症病人的工具。

in the paper, impact evaluation of community health education as well as parasitic transmission dynamics were analysed according to data of infection rate and intensity of 7-14 years old population in both study and control areas.

并根据观察区与对照区7～14岁高感染人群感染率及感染度，各年度麦穗鱼感染率及感染度，作了社区健康知识教育效应分析和寄生虫病传播动力变化分析。

A new report by the US census bureau highlights a huge shift towards not just an ageing but an old population, with formidable consequences for rich and poor nations alike.

美国人口普查局的一份最新报告着重提到，人口发生了巨大的转变，不仅是趋于老化而且是进入老龄化，给富裕及贫穷国家都带来同样难以应付的影响。

Compared with the cities, our country rural old population cardinal number is big, the aging speed is faster, old population quantity grows quickly, so the retirement problem is more outstanding.

相对于城市而言，农村老年人口基数大，老龄化速度快，老年人口数量增长快，因此养老问题更为突出。