China's working-age population will not increase between now and 2030. But the number of people 65 or older will triple.

劳动群体现在到2030年间不会增加，而65岁以上人口会增加三倍。

youdao

The number of people living in 28 African countries is also expected to double, and by 2100 several countries will see a fivefold increase in their population.

28个非洲国家的人口数量预计将翻一番，到2100年有几个国家的人口将增加五倍。

youdao

Thee number of people living in 28 African countries is also expected to double, and by 2100 several countries will see a fivefold increase in their population.

28个非洲国家的人口数量预计将翻一番，到2100年有几个国家的人口将增加五倍。 。

youdao

Because of the global population ageing, the number and burden of strokes will increase.

BBC: Drug 'may prevent stroke damage'

But this latest edition of the American Psychiatric Association's Diagnostic and Statistical Manual, or DSM-5, will only make a bad situation worse because it will lower many diagnostic thresholds and increase the number of people in the general population seen as having a mental illness.

BBC: 'Grief and anxiety are not mental illnesses'