The Asuka Period is a part of Japanese history, a time when culture and arts greatly developed.

The Muromachi period is a part of Japanese history, a time when many cultural changes occurred.

The Kamakura period was a very important time in Japanese history.

The interior of this room is very beautiful.

He was the first discoverer of that new species of plant.

Rino is my best friend.

Hydrocyanic acid is a very dangerous chemical.

He is a world-renowned biologist.

He is a world-renowned zoologist.

He is an expert in sociolinguistics.