Μικρά έξυπνα κορίτσια με φιάλη δοκιμής. παιδιά σπουδάζουν στο μάθημα της βιολογίας. επιστημονική έρευνα στο εργαστήριο. γνώση και την εκπαίδευση. πίσω στο σχολείο. δοκιμή υγρού. τα παιδιά κρατούν τα δοχεία δοκιμών. ω όχι.. - Φωτογραφίες & Εικόνες Αρχείου

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