adorable
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chalkboard
chemical
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child
child care
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fascinating
fascinating chemistry
is
kid
kids
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man
microbiology
microscope
observe
pupils
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school
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science
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student
study
teacher
technology
test
to
tubes
定額
Explaining chemistry to kids. Fascinating chemistry lesson. Man bearded teacher and pupils with test tubes in classroom. Observe reaction. Science is always the solution. School chemistry experimentの素材 [FY310130381334]
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