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

This baked skewered tofu in miso sauce has a very good flavor.

I am majoring in cytology at university.

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

He is an expert in hydrology and is conducting research on flood prevention.

He is majoring in quantum mechanics at university.

Combinatorics is a branch of mathematics that studies combinations of things.

Combinatorics is a branch of mathematics dealing with issues of order and choice.

Combinatorics is a branch of mathematics that studies combinations of things.

Taxonomy is an important tool for understanding the diversity of life.