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chemical equation
It's difficult to decipher this chemical equation.
Understanding chemical equations is difficult.
chemical analysis
He is an expert in chemical analysis.
chemical fertilizer
We are growing vegetables without using chemical fertilizers.
(chemistry) chemical element
Oxygen, which is one of the chemical elements, is necessary for us to breathe.
chemical reaction, chemical change
In this experiment, you can observe a chemical reaction.
undergo a chemical change
This substance undergoes a chemical change when heat is applied.
chemical weapon
The use of chemical weapons is prohibited by international law.
biological chemistry
I am majoring in biochemistry at university.
chemical engineering
My major is chemical engineering.
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