My brother is a master of Taido.

We belong to the same class.

This statue is made of copper.

He found an old copper coin.

He is an expert in ethology, and his research is highly regarded worldwide.

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'

She has zoophobia, so she can't go to the zoo.

Despite their simple body structure, nematodes have surprisingly complex ecosystems.

My uncle is a famous zoologist.

He believes in zoolatry and lives a life in harmony with nature.