Millions of middle-aged singles in Japan still live with their elderly parents and depend on them financially, research has revealed, contributing to the county's falling birth rate and ageing population. 

调查显示，日本有数百万中年单身族依然与年迈的父母同住，并在经济上依赖父母。这加剧了日本出生率的下降和老龄化负担。

The country had an estimated 4.5 million unemployed -- or under-employed -- and unmarried 35- to 54-year-olds who still lived at home in 2016. They have been dubbed "parasite singles" by researchers. 

2016年，有约450万失业或就业不充分的35岁至54岁的单身族与父母同住。他们被称为“单身寄生族”。

Sociologist Masahiro Yamada coined the term "parasite singles" in 1997. 

社会学家山田正弘在1997年创造出这一词汇。