Mouke-no-kimi appears in The Tale of Genji.

He rubbed his hands together to get warm.

He is playing the character of Bun.

Protein-degrading enzymes play a role in breaking down unnecessary proteins in the body.

This compound has a tetrahedral molecular geometry.

The Riemann sum is a method for approximately calculating the integral of a function.

The Koizumi Shinjiro structure brought a new wind to Japanese politics.

This problem is difficult.

What does this sentence mean?

Humanities is an academic field that studies human culture and society.