Infancy, childhood, youth, middle-aged, old age... the best of childhood.

幼年、童年、少年、中年、老年…最美好的是童年。

youdao

A combination vaccine, using strains of HIV common in Thailand,was tested on Thai men and women aged 18 to 30 years old, who were HIV-negative.

VOA: standard.2009.10.20

The Echo was disproportionately read by skilled manual workers and by the middle-aged and old.

ECONOMIST: Local newspapers in peril

"It is believed that any aged, old woman with red eyes is a witch, " Mr Missika said.

BBC: NEWS | Africa | Tanzania arrests 'witch killers'

In 2010, she placed 18th out of 60 competitors at the European championships for able-bodied dressage riders aged 21 years old and younger.

WSJ: Blade Runner Is on a Well-Trodden Path