My friend is suffering from simple herpes.

His new car is a Mustang.

This drink contains carbonic acid.

An imaginary unit is an important concept in mathematics.

This simple forest is very important from the perspective of biodiversity.

An astronomical unit represents the average distance from the Earth to the Sun.

This factory has significantly reduced its carbon dioxide emissions.

I always use binchotan charcoal when I grill meat.

He was painting a picture using red lead.

He plays the role of a canary in a coal mine in our team.