He is an expert in nuclear physics.

He is an expert in nuclear physics and has won many awards in the field.

He is an expert in astrophysics, and his research is highly valued around the world.

He is an expert in applied physics.

He is known as a person with learning.

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

Exercising every day is important for maintaining 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.