middle-aged
中年
elderly
of people 人 used as a polite word for old 年紀較大的,上了年紀的(婉辭,與 old 同義)
childhood
the period of somebody's life when they are a child 童年;幼年;孩童時期
adulthood
the state of being an adult 成年
teenager
a person who is between 13 and 19 years old (13 至 19 歲之間的)青少年,青少年男女
Generation
all the people who were born at about the same time (統稱)一代人,同代人,同輩人
early-twenties
二十剛出頭
mid-thirties
大約三十五六歲
late-forties
快五十歲
baby toddler
嬰兒學步