A new school term is starting.

He experienced many difficulties during his adolescent.

The heyday of his music career was in the 1980s.

His attendance is irregular.

His irregular attendance is disrupting the team's schedule.

He is still in his tsun phase, so he doesn't talk much.

She is in her dere phase now.

He is experiencing the difficulties of puberty.

According to Freud's theory, the phallic stage is a part of a child's sexual development.

Infancy is an important period for human growth and development.