His language contains many ejective sounds.

This area is affected by radioactive fallout from past nuclear tests.

This area is seriously contaminated with radioactive isotopes.

He ate one apple.

It is important for each person to fulfill their role.

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.

This food may contain carcinogens.

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