单词：nonagenarians
(nonagenarian 的复数) a. 90至99岁的
n. 90至99岁的人
n. 90至99岁的人
plural of nonagenarian
n. someone whose age is in the nineties
s. being from 90 to 99 years old
n. someone whose age is in the nineties
s. being from 90 to 99 years old