It's very easy to walk on this flat road.

The initial response when an earthquake occurs is very important.

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.

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.