He is an expert in electronics.

He is majoring in linguistics.

He decided to study abroad in America.

He has a deep interest in astronomy.

He is a student at the University of Tokyo.

Quantum chromodynamics is a part of particle physics that describes strong interactions.

He is studying thermodynamics in depth.

Electromagnetism is a part of physics that studies the interaction between electricity and magnetism.

Quantum mechanics is a branch of physics that studies the behavior of microscopic particles.

He is majoring in analysis at university.