He was diagnosed with bipolar disorder.

Basic oxides react with acids to produce salt and water.

This area is affected by radioactive fallout from past nuclear tests.

I consigned my dog to him.

Fumiko wrote him a letter.

We decided to explore the cave.

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.