He bought a new coat.

We had a deep debate about that issue.

His performance was really wonderful.

I bought a new bathing suit.

Observing manners is important in social life.

He made travel plans using a globe.

He is using an octant for navigation.

Mr. Konomi is my best friend.

In the ecosystem of this area, 'inquilinism', where certain species parasitize the nests of other species, is common.

Learning about the history of Seiban is important for understanding our past.