He is researching about a new energy source.

He is known as a person with learning.

He told me the whole story of the incident.

It is important to understand the importance of health.

His dream is to do a space walk.

His dream is to walk in space.

My major is oceanography.

Marine pollution is a global issue, and all countries should cooperate to find a solution.

My brother is a graduate student at the University of Tokyo.

He is a world-renowned researcher.