He is an expert in paleoecology, pouring his passion into studying past ecosystems.

He has a deep interest in paleozoology.

He is known as an expert in palaeoclimatology.

He is studying computer science at a specialized school.

There are many different specialty stores in this town.

He is a specialist fool, with no interest in anything outside his field.

He couldn't say anything about issues outside of his field of expertise.

He has expert knowledge.

He is known as an excellent researcher.

My laboratory is on the third floor of the university.