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

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.

We exist as a part of the material world.

This food may contain carcinogens.

This animal is a protected species, so you must never touch it.

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

The consent of the guardian is necessary.

Chameleons can change their camouflage color to match their surroundings.

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