He is a renowned political scientist who has written many important papers.

On days when the solar radiation is strong, don't forget to apply sunscreen.

She hugged me gently as if she were my mother.

He achieved results in the exam that were in accordance with his reputation.

We started a collaboration for a new project.

We decided to collaborate on a new project.

He has contributed to the company for many years as an elderly worker.

He learned about the concept of synergism in theology class.

There are several words used as 働詞 in this ancient document.

He continued hard labor all day long.