Amicable numbers refer to a pair of natural numbers that have a special relationship in number theory, a branch of mathematics.

It is important to understand the importance of health.

He is involved in the development of androids.

He became distrustful of other people due to his past experiences.

Rumors are spreading throughout the town that he is a werewolf.

I undergo a complete medical checkup every year.

He avoids interacting with people because he is a misanthrope.

He was recognized as a living national treasure of Japan.

His success had a cause-and-effect relationship with his efforts.

He and I are related by blood.