Selektywne skupienie dziecka pisanie i patrząc przez Mikroskop w pobliżu probówek z płynem w klasie - Materiał filmowy & wideo

Selective focus of kid looking through microscope in classroom

Selective focus of kid writing in notebook and looking through microscope near test tubes with liquid in classroom

Schoolboy looking at red liquid in flask and scratching head, having no idea

Little nerd comparing liquids in flasks and writing reaction results, innovation

Lifestyle footage of modern people

Lifestyle footage of modern people

Selective focus of kid looking through microscope in classroom

Selective focus of kid writing in notebook and looking through microscope near test tubes with liquid in classroom

Pretty, attentive scientists making research with microscope in laboratory

Two serious scientists talking in laboratory near table with medical glassware

Attentive scientist looking at blue liquid in test tube and writing down results in laboratory

Selective focus of pretty scientist looking in microscope and talking to colleague in laboratory