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unidentified student in chemistry lab testing some unidentied chemicals, arabic chemist working at school, chemical experiment in classroom, young chemistry teacher sitting at table, chemistry science and learning
Keywords:
men
education
studying
adult
book
working
indoors
caucasian ethnicity
teacher
blackboard
intelligence
scientific experiment
science
student
formula
classroom
research
schoolboy
males
school building
scientist
professor
chemistry
learning
one person
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