I learned about the properties of phosphorous acid in chemistry class.

We will use phosphoric acid in this chemical experiment.

In biochemistry, phosphorylation is an important process in energy metabolism.

This enzyme has the function to phosphorylate proteins.

Our region is rich in forest products, especially in the production of timber.

He is an expert in chemistry.

He received the letter challenging him to a duel and began preparing for the duel.

Gender roles are an important element in defining individual behavior in society.

His role is to fulfill his responsibilities as a leader.

She is Rin, a college student majoring in art.