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.

The existence of dark matter has not yet been fully proven.

The air in this area is greatly affected by pollutants emitted from factories.

The consent of the guardian is necessary.

Protectionist policies are introduced to protect domestic industries from foreign competition.

He committed another crime while on probation.

This sanctuary plays a crucial role as a habitat for endangered species.

She was raised by overprotective parents.