He succeeded very much.

Research on retroviruses is greatly contributing to the advancement of medicine.

I am doing volunteer work to contribute to the community.

His research made a significant contribution to the scientific community.

We are witnessing the progress of science and technology.

His progress in Japanese is astonishing.

He majors in medicine.

He is researching about a new energy source.

He is conducting research on a new energy source.

She is studying traditional Chinese medicine and is utilizing that knowledge.