Лабораторний мікроскоп і випробувальні трубки. Мій хімічний експеримент. Повернутися до школи і щасливого часу. Веселий усміхнений маленький хлопчик розважається на синій стіні - Стокове фото та зображення

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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

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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