I am majoring in physical chemistry at university.

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.

The Transmission Control Protocol is an important element for ensuring the reliability of data communication.

The tachometer of my car has broken.

He claims to have seen an unidentified flying object.

I am majoring in biophysics at university.