A terrestrial planet may have an environment similar to Earth.

Biocentrism is a theory that everything in the universe exists focusing on life.

The heliocentric theory is the idea that the sun, not the earth, is the center of the universe.

World War I was a large-scale war that lasted from 1914 to 1918.

He was anxious about starting a new business, but I encouraged him by saying, 'Even a journey of a thousand miles begins with a single step.'

Ogura Hyakunin Isshu is one of the classical literatures of Japan.

Today is my birthday.

Our store has a regular day off every Monday.

Our project is scheduled to be completed on the twentieth day of the month.

Day after day, he continued to strive to solve the problem.