广播电视英语短句 第 238 课：痴呆的主要原因-3

In low and middle income countries, heart disease and cancer get much of the attention given to chronic diseases. 在中低收入国家，心脏病和癌症是受到人们广泛关注的慢性病。

The researchers say increased importance should be given to chronic diseases of the brain and mind. 研究人员表示智力和情绪方面的慢性病应该得到越来越多的关注。

As populations age, societies will have to deal with more and more cases of dementia. 随着人口老化，社会将不得不应对越来越多痴呆的病例。

The study says the elderly are nine percent of the total population of low and middle income countries today. 研究显示今天中低收人国家， 9% 的总人口是老年人。