They have a valuable contribution to make to the progress of the world.

However, this did not stop him from making a valuable contribution to both culture and science.

But in their own way these shows also make valuable contributions to the development of art.

John made valuable contributions to every area of our organization.

I rate it as the most valuable contribution you can make to this department.

When science was younger, almost anyone could make valuable contributions.

Mitchell has also made valuable contributions to the history of economic thought.

This report is a valuable contribution to change, but will anything actually happen?

I would also like to thank the members of the committee for their valuable contributions on this very important subject.

"But the better partner is the one who makes the more valuable contribution."