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

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

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

This problem is difficult.

What does this sentence mean?

He is playing the character of Bun.

Did you hear his voice?

He left early to avoid the problem.

He is strong like a warrior.

UNESCO is an international organization that promotes the development of education, science, and culture around the world.