The electrolytic capacitor is an important part of electronic equipment.

He is an expert in physics.

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

He is a world-famous physicist.

My diet is rich in protein.

This reaction occurs through a chemical process.

He is an excellent chemist who made many discoveries.

He is an expert in petrochemistry.

It's difficult to decipher this chemical equation.

Understanding chemical equations is difficult.