My sister , who is five years older than me , has greying black hair , and she 's thinking of letting it grow out now , too .

我的姐姐比我大五岁，头发斑白，她现在也计划让白发自然生长。

Demographic change is another reason why the workforce is greying .

人口变化是劳动力老龄化的又一原因。

This imminent greying of society is compounded by two other demographic shifts .

以下两个人口趋势变化更加剧了即将到来的老龄化。

But demographers , economists and politicians are right to fret about our greying .

但人口统计学家，经济学家和政治家们对老龄化的担忧还是有道理的。

Greying audiences are causing discomfort among media executives .

观众老化令媒体业高管感到担忧。