Szczęśliwy uśmiechnięty uczeń rysujący przy biurku. Portret z bliska. Dzieciak uczy się w klasie na tle tablicy. To był mały eksperyment chemiczny. Lekcja chemii - Zdjęcie stockowe & obraz

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A chemistry demonstration. Back to school. Child from elementary school. Portrair close up. They carried out a new experiment in chemistry

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Lab microscope and testing tubes. My chemistry experiment. Back to school and happy time. Cheerful smiling little boy having fun against blue wall

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