He is an expert in applied physics.

He is an expert in biophysics.

He is an expert in geophysics.

He is an expert in theoretical physics.

He is known as a person with learning.

Exercising every day is important for maintaining health.

It is important to do athletics every day to maintain health.

It is important to understand the importance of health.

He loves physics and studies it in the library almost every day.

I am majoring in physical chemistry at university.