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.

This book is in 10 volumes.

He offered sake to the shrine.

Is this product packaged together?

Him calling me lazy is truly a case of the pot calling the kettle black.