He is an expert in planetary science.

He is immersed in the study of sensual literature.

Discrete mathematics is an important field that forms the basis of computer science.

He participated in the student movement of the 1960s.

Graphology is the study of determining a person's character or condition from their handwriting.

Graphology is a study that interprets a person's character and abilities from their handwriting.

My younger sister is attending a junior college.

He is writing a thesis on geomorphology.

He is doing a special exercise to train his digastric muscle.

He is writing a thesis on celestial mechanics.