He is majoring in civil engineering.

Statistical mechanics is a branch of physics that provides a theoretical framework for understanding macroscopic phenomena from a microscopic perspective.

Abstract algebra is a branch of mathematics that studies algebraic structures.

Music therapy is very effective in reducing stress.

Abstract algebra is a field of mathematics that studies algebraic structures in an abstract way.

He is an expert in geophysics.

He is a world-renowned zoologist.

It's difficult to understand the principles of electrooptics.

I am majoring in econometrics at university.

Functional analysis is a branch of mathematics that studies the properties of functions in infinite-dimensional spaces.