young adult

A young/prime adult, according to Erik Erikson's stages of human development, is generally a person in the age range of 20 to 40, whereas an adolescent is a person aging from 13 to 19, although definitions and opinions vary. The young adult stage in human development precedes middle adulthood.

1. Young adults are increasingly choosing to delay marriage and focus on their careers.
   年轻成年人越来越倾向于推迟婚姻并专注于事业发展。
2. The book is categorized as young adult fiction and is popular among readers in their early twenties.
   这本书被归类为青年成人小说，在20岁左右的读者中很受欢迎。