He has a wealth of scientific knowledge and is always excited about new discoveries.

He is majoring in philosophy.

He is pouring his passion into language study.

He is interested in geometrical shapes.

He is an expert in statistics.

My grandfather is being seen by a specialist in geriatric medicine.

He proposed a new theory about quantum mechanics.

He is an expert in petrochemistry.

He is an expert in folklore studies, and his research is highly regarded worldwide.

I have a deep interest in French literature.