He is a world-famous physicist.

He understands the importance of learning.

He is majoring in psychology.

Gaku is my best friend.

He has a deep interest in archaeology.

A fermion is one of the fundamental constituents of matter.

He is involved in the research of particle accelerators.

I am majoring in biophysics at university.

I am majoring in physical chemistry at university.

He is majoring in linguistics.