He is spending a lot of time on experimental research.

My salary is paid once a month.

My monthly income is 300,000 yen.

The power supply in this area is stable.

We took a one-hour rest.

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

He is participating in an elementary level Japanese class.

He has risen in social standing.

I am surprised at the quickness of this project's progress.

Earth science is an important field of study for unraveling the mysteries of nature.