Liquid nitrogen is very cold, so care must be taken when handling it.

Liquid oxygen is often used as rocket fuel.

It's difficult to understand his mental state.

He is studying about the metamorphosis of insects.

Our new project will start on the third day of the month.

He ate three apples.

This food may contain carcinogens.

We exist as a part of the material world.

Antibiotics don't work for colds, so please don't take them unnecessarily.

It is said that antimatter has properties opposite to those of matter.