英语情景口语:Age年龄

Young /old/ middle-aged /elderly /childhood /adulthood/ teenager

Generation /retire /early-twenties/ mid-thirties/ late-forties /baby /toddler

Adolescent/ kid /life expectancy /21 years old /look(older)/ turning-point/ mature

Child/ youth /life/ middle /old /age /pension

adulthood [əˈdʌlthud] n. 成年(期)

Toddler : is a common term for a young child who is learning to walk or "toddle" , generally considered to be the second stage of development after infancy and before childhood occurring predominantly during the ages of 12 to 36 months old.

adolescent [ˌædəˈlesnt] n. ( pl. adolescents )青少年 ( being of the age 13 through 19 )adj. 青春期的 / 青少年的;幼稚的,未成熟的 

Her remarks seemed a bit adolescent. 她的这番话似乎有点幼稚。

youth: the time of life between childhood and maturity

mature [məˈtjuə] adj. ( maturer; maturest )

1.成熟的;酿熟的 This is the most mature of his plays.这是他最成熟的一部剧作。

2.成年人的  She has the figure of a mature woman. 她有成年女性的体型。

3.稳重的;慎重的,周到的  Can't you behave in a mature way?你的举止不能稳重一点吗?

maturity [məˈtjuəriti] n.

1. 成熟;完善 (reach maturity 成熟)This job calls for a man with a great deal of maturity.这个工作需由老练持重的人去做。

2. (支票等的)到期 pay at maturity 到期付款

pension [ˈpenʃən] n. ( pl. pensions )退休金;养老金;抚恤金

( A pension is a steady income given to a person (usually after retirement). Pensions are typically payments made in the form of a guarantee )

She lived on a small pension. 她以一点退休金为生。