“aged population”可以造什么句，aged population造句

Prevalence of pterygium in rural Beijing aged population

The aspect of payment of the old-aged insurance fund, our country faces the problem of aged population, turning to retire early, changing costs so that it pays the money difficultly gradually.

Epidemiological study of depression in aged population in Shanghai area.

Various measures will be adopted in an effort to solve the problems related to the social security and cultural well-being of the aged population.

Comparative study on constitution of the aged population of China and Japan;