His lady is very beautiful.

My son says he wants to become a doctor.

He lives alone in the depths of the mountains.

In the deepest depths of his heart, there is a secret that he can't tell anyone.

Mr. Kasaoka is my best friend.

He participated in the discussion about euthanasia.

This is something set aside for use later.

Octadecane is one of the important hydrocarbons in organic chemistry.

This gasoline has a high octane rating.

Kiyoka-san is my best friend.