The study of gravitational waves contributes greatly to our understanding of the universe.

It's difficult to understand his explanation.

He succeeded very much.

His research made a significant contribution to the scientific community.

I am doing volunteer work to contribute to the community.

It's difficult to understand his explanation.

The gravity of the Earth is stronger than the gravity of the Moon.

There are big waves in the sea.

I dream of traveling through the universe someday.

He is conducting research on a new energy source.