空巢老人 empty nesters
With no children at home to take care of them, empty nesters have become increasingly vulnerable.
由于没有孩子在家照顾他们，“空巢老人”变得越发脆弱了。
The number of empty nesters and the childless may reach 79 million by 2050.
到2050年，空巢老人和无子老人的人数可能达到7900万。
