He is majoring in the study of national law.

He understands the basic concepts of thermodynamics.

He was deeply thinking about '稽'.

Euclidean geometry forms the foundation of geometry.

I am majoring in auditory phonetics at university.

Articulatory phonetics is a study about the production of speech sounds.

Acoustic phonetics is the study of the physical properties of speech.

I am majoring in microbiology at university.

He is interested in geometrical shapes.

I studied calculus at university.