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chemical analysis
He is an expert in chemical analysis.
chemical equation
It's difficult to decipher this chemical equation.
Understanding chemical equations is difficult.
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.
(chemistry) chemical equilibrium
Understanding chemical equilibrium is very important in understanding chemical reactions.
undergo a chemical change
This substance undergoes a chemical change when heat is applied.
chemical reaction, chemical change
In this experiment, you can observe a chemical reaction.
a taiga bean goose (Anser fabalis)
The taiga bean goose is a bird often seen in Japan during winter.
summer retreat
We go to the summer retreat every year.
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