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pollutant
The air in this area is greatly affected by pollutants emitted from factories.
dark matter
The existence of dark matter has not yet been fully proven.
antibiotics
Antibiotics don't work for colds, so please don't take them unnecessarily.
(physics) antimatter
It is said that antimatter has properties opposite to those of matter.
The material world.
We exist as a part of the material world.
carcinogen
This food may contain carcinogens.
a Russian Blue
My pet is a Russian Blue cat.
(inorganic chemistry) hydrogen cyanide
Hydrogen cyanide is a colorless liquid with a distinctive smell.
chemical
This reaction occurs through a chemical process.
a chemist
He is an excellent chemist who made many discoveries.
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