Σοβαρός Αφρικανός Αμερικανός επιστήμονας κάνοντας έρευνα και χρησιμοποιώντας σταγονόμετρο και τα πιάτα - Πλάνα & Βίντεο Αρχείου

Focused african american doctor adding red liquid into test tube while making analysis in laboratory

Attenive african american scientist using dropper and petri dishes while making research in laboratory

Angry Doctor Thumbs Down Sign Bad News Concept

4K Close up of medical researcher in the lab looking at a slide under microscope

4K Close up medical researcher working in the lab looking into microscope

4K Close up of medical researcher in the lab looking at a slide under microscope

Focused african american doctor adding red liquid into test tube while making analysis in laboratory

Attenive african american scientist using dropper and petri dishes while making research in laboratory

Selective focus of african american scientist using smartphone in clinical laboratory

African american scientist in glasses using microscope and then looking at camera

Cheerful african american doctor smiling and gesturing while talking on smartphone in laboratory

Handsome, positive african american doctor smiling while looking at camera