A comma (butterfly) is fluttering in the garden.

He is receiving treatment for hepatitis C.

In this chemical reaction, a specific isotope is produced.

She wrote her name in cursive script.

This sentence is written in bold typeface.

This pathogen is very dangerous to humans.

There is a possibility that unknown lifeforms exist on this planet.

He is deeply researching the theory of real number fields.

He saw the light through the transparent object.

This colony is forming a unique ecosystem.