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(physics) antimatter
It is said that antimatter has properties opposite to those of matter.
dark matter
The existence of dark matter has not yet been fully proven.
pollutant
The air in this area is greatly affected by pollutants emitted from factories.
chemical weapon
The use of chemical weapons is prohibited by international law.
analytical chemistry
Analytical chemistry is a science that reveals the composition and structure of substances.
physical chemistry
I am majoring in physical chemistry at university.
(chemistry) a chemical reaction
This chemical reaction is very dangerous.
inorganic chemistry
I am majoring in inorganic chemistry at university.
chemical engineering
My major is chemical engineering.
biological chemistry
I am majoring in biochemistry at university.
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