He is passionate about competitive programming.

He became obsessed with publicly-owned gambling enterprises and used up all his savings.

He is always hanging out with bad friends. Truly, birds of a feather flock together.

He likes to take a walk in the park at dusk.

Pentathlon is a competition that tests both physical strength and technique.

He participated in the Olympics as a pentathlon athlete.

My brother is participating in a rifle shooting competition.

I dream of participating in the next Olympic Games.

We should always remember the power of Kannon in difficult times.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.