This beautiful scenery has an eternally unchanging value.

His belief is eternally unchanging.

Let's look at this truth table and understand the result of the logical expression.

The culture of the Nara period played a very important role in Japanese history.

During the Ice Age, the climate of the Earth changed significantly.

He survived through the Dark Ages.

This piece of art reflects the zeitgeist of its time.

The Age of Enlightenment was a period when science and reason were emphasized.

The Yayoi period is a part of Japanese history.

The Asuka Period is a part of Japanese history, a time when culture and arts greatly developed.