Foyer sélectif de tube à essai coloré près de la fille - Clips & vidéo de stock

Selective focus of test tube with colorful liquid

Young scientists makes experiment with egg, fire and flask. Chemists set fire to a piece of paper and put it inside the bulb. Little scientist put egg in flask and it slowly moves to the bottom of

Close-up of laboratory assistant hands working in modern Laboratory

Employee of research institute pouring gasoline into flask for quality testing

Selective focus of test tube with colorful liquid

Rack focus of kid adding color in test tube

Rack focus of kid putting test tubes on table

Hyperlapse of kid adding color in test tube

Focus pull of kid looking at colorful liquids

Cropped view of kids mixing liquids