academic
adorable
analyzing
asian
assistance
back to school
beaker
caucasian
chemical
childhood
class
classroom
concentration
education
elementary
elementary school
experiment
filming
flasks
focused
guidance
happy
holding
innocence
junior
kids
knowledge
korean
lab
lab coat
laboratory
learn
learning
liquid
looking
practice
primary
protective eyewear
research
school
schoolboy
schoolchild
schoolgirl
science
slow
standing
student
study
teacher
test
定額
Asian teacher doing experiments with dry ice for children at classroom in modern school. During experiment scientist holds flask showing reaction smoke and colored liquid.の素材 [FY310134898122]
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