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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.
organic chemistry
I love organic chemistry classes.
immunochemistry
He is dedicated to the study of immunochemistry.
chemical pollution
Chemical pollution has a serious impact on the health of the Earth.
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