group school pupils study chemical liquids test tubes with colorful substances girls and boy student conduct |
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| navigate by keyword : adorable boy caucasian chalkboard check chemical chemistry child childhood children colorful concept conduct education experiment formal girls group intellectual intelligent interesting kids knowledge laboratory learning lesson liquids little pupil pupils result school schoolgirl shocking smart student students study subject substances task test tubes |
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| Group school pupils study chemical liquids. Test tubes with colorful substances. Girls and boy student conduct school experiment with liquids. Check result. School chemistry lesson. School laboratory. |
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