My toxicology textbook is very difficult to understand.

My specialty is psychiatry.

I am majoring in phonetics at university.

I used the student discount at the movie theater.

My major is chemical engineering.

He is an expert in fiber optics.

Fiber optics is a part of communication technology.

He is an expert in enzymology and conducts many researches.

Cell biology is the study of the structure and function of cells, which are the basic units of life.

Every morning, my mother lights incense at the Buddhist altar.