Πορτρέτο της χαμογελαστός άνθρωπος δάσκαλος βλέπει ενθουσιασμένος κορίτσι φοιτητής κατά τη διάρκεια πειράματος στο εργαστήριο - Φωτογραφίες & Εικόνες Αρχείου

Boy and girl in lab coats looking at camera in chemical laboratory

Portrait of exited man teacher and girl student scientists making experiment in lab

Portrait of shocked girl scientist looking at experimental tube in lab

How come. Jolly astonished boy screaming while moving hands while gay girl combining liquids

Schoolgirl in white coat making experiment with reagents in chemical lab, science student concept

Let me help you. Nice friendly female teacher standing behind the girl and smiling while helping her with chemical liquids

Concentrated boy and girl holding test tubes with reagents in chemical lab

Multicolored liquids. Astonished little surprised girl elevating bulbs filled while different liquids and opening mouth

Portrait of cheerful scientist showing laboratory tubes and looking to camera

Scientist showing laboratory tube, focus on foreground

Young male chemist holding flask with green liquid

Smiling scientist holding molecular model in laboratory, focus on foreground

Professional chemists in white coats inspecting test tubes with reagents in lab

Young man scientist in eyeglasses and white coat examining test tube in laboratory

Professional chemists in white coats inspecting test tube with reagent in lab

Portrait of smiling scientists in uniforms holding laboratory tubes