2, aged years is a Chinese idiom, describing the time when one is very old. It comes from Cao Cao's "The Right Wine": "The oldest and the oldest are all able to live to a ripe old age, and the grace is wide and grass and insects."
3, eighty or ninety years old: eighty or ninety years old. The sound of eighty or ninety years old is "冒", and the sound of eighty is "迭".