The contemporary society class is very interesting to me.

Modern society classes are important for a deep understanding of history and contemporary society.

A googol is a large number that represents 10 to the power of 100.

He made a sentence using the instrumental case.

Mamiko is studying in the library every day.

This plan has not yet reached the concrete stage.

She didn't know how to use the sex toy.

She enjoys her sex life using a sex toy.

This toy is my child's favorite.

The epicenter is located about 100 kilometers southeast of Tokyo.