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(chemistry) natron
I learned about natron in chemistry class.
to study / to learn
I like to study new languages.
instruction; teaching; school; lesson, class
I attended a math class today.
teach; to instruct; give a lesson
I will teach mathematics to new students tomorrow.
chemistry (branch of natural science)
He is majoring in chemistry at university.
He is an expert in chemistry.
in class
The use of mobile phones is prohibited during class.
a visit by a student's guardians to observe the class
There is a class observation at my son's school tomorrow.
chemical
This reaction occurs through a chemical process.
a chemist
He is an excellent chemist who made many discoveries.
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