I bought a new bathing suit.

My hobby is keeping saltwater fish.

He bought new swimming trunks.

He is majoring in hydrology at university.

He is the type of person who can distinguish between good and bad.

Please tell me the International Standard Book Number of this book.

The future of mankind is in our hands.

This library adopts its own classification method.

Taxonomy is the science of finding, understanding, and naming species of organisms.

In this library, books are classified by genre.