used for describing young adults who may behave as if they have not yet fully developed into adults

They were a bunch of fame-struck post-adolescent wannabes.

His post-adolescent peer group believed themselves to be intellectuals. 他的后青春期同龄人认为自己是知识分子。

relating to the period soon after someone becomes an adult, when they may behave as if they have not yet fully developed into an adult

He says that he worked through a lot of his post-adolescent angst on the first album. 他说他在第一张专辑中克服了很多后青春期阶段的焦虑。

The research focused on postadolescent transition from high school into higher education and adult life.

used for describing people who are adults rather than children

Cellulite appears in 90% of post-adolescent women. 青春期后的女性90%都会出现橘皮组织。

relating to any period after someone becomes an adult

Post-adolescent acne may be "persistent acne" (continuing from adolescence) or "late-onset acne". 青春期后的痤疮可能是“顽固性痤疮”（从青春期开始持续）或“晚发性痤疮”。

Very few studies compare the health of twins who were raised together, but who differ in their postadolescent socioeconomic position.

someone who has recently become an adult, but who may behave as if they have not yet fully developed into an adult

Some students are moody post-adolescents, still working out what it means to be adults. 有些学生是喜怒无常的后青春期青年，仍未弄清成为成年人意味着什么。

The team needs experienced muscle, not post-adolescents.

someone who is an adult rather than a child

He believed that post-adolescents cannot acquire new dialects in the way that pre-adolescents can. 他认为，青春期后不能像青春期前那样学会新的方言。