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

The study of nekton is an important part of marine biology.

I am very interested in marine biology.

He is immersed in the study of dialectical materialism.

As the name suggests, chordates are a group of animals that have a notochord.

As the name suggests, onychophorans are a unique group of animals that have claws.

He is an expert in paleozoology and has a deep knowledge about the ecology of dinosaurs.

He has a deep interest in paleozoology.

He is as kind as a Buddha.

He is in his unlucky year, so he needs to be particularly careful.