学术类雅思 (5分及以下) - 年龄

still in the earlier stages of life

年轻的

living in the later stages of life

(of a person) approximately between 45 to 65 years old, typically indicating a stage of life between young adulthood and old age

中年

fully developed and mature

成熟（身体上）

intended for or related to young people, particularly in sports

年轻人

old and mature of age

成熟

having the age of thirteen to nineteen

青少年

having the characteristics that are typical of young people

年轻有活力

fully-grown and physically developed

成熟

advanced in age

老的

related to individuals who are considered elderly