My younger brother will enter the engineering department next year.

He is a world-famous mathematician.

He is an expert in ornithology, studying types of birds all over the world.

He has a deep interest in etymology.

I bought a new study aid for my math exam.

He is an expert in applied physics.

My sister works as a physical therapist.

He is an expert in Classical Chinese text studies, and is good at interpreting ancient Chinese literature.

Proletarian literature is a type of literature that depicts the life and struggles of the working class.

Spectroscopy is an important means of investigating the properties of matter.