This mineral is very rare.

This toothpaste contains fluoride.

On cold nights, a warm quilt is necessary.

She bought a new dress at that boutique.

He is majoring in physical chemistry at university.

I am majoring in physical chemistry at university.

Our body is constantly excreting waste products.

Antimatter is said to have the opposite properties of matter.

Gymnosperms are a type of plant that directly release their seeds into the air.

I will go fishing for grouper.