My room is on top of the building.

This book is the first volume of a trilogy.

We will make a decision after listening to his opinion.

We conducted a spectral analysis to investigate the spectral characteristics of this substance.

Mineral oil is often used in the manufacture of cosmetics and pharmaceuticals.

He is majoring in mineralogy at university.

It is important to understand the importance of health.

My room is on the second floor, and your room is above mine.

Tanaka-san, have you finished the report?

Mr. Ue is my best friend.