Maybe because of lack of sleep, my head feels fuzzy.

He is a student at the University of Tokyo.

I love biology.

Phonetics is a part of linguistics that studies the physical, physiological, and psychological aspects of sounds.

Geopolitics is the key to understanding important aspects of international relations.

I am majoring in biology at university.

He is good at performing opera.

My company specializes in the manufacture of fine chemicals.

I am majoring in biochemistry at university.

I am majoring in Biochemistry at university.