Kobieta naukowiec zmieszanie dwóch substancji płynnych. Odkrycia naukowe. - Materiał filmowy & wideo

Woman scientist mixing together two liquid substances. Scientific discoveries.

Beautiful nurse with a hairdo is putting on eyeglasses with yellow glass and smiling in the laboratory

Woman scientist mixing together two liquid substances. Laboratory examination.

Woman scientist mixing together two liquid substances. Laboratory examination.

Boy decorating Christmas toy Christmas tree Ukraine

Sad female calling parents to talk about problems, depression, loneliness

Woman scientist mixing together two liquid substances. Scientific discoveries.

Beautiful nurse with a hairdo is putting on eyeglasses with yellow glass and smiling in the laboratory

Woman scientist mixing together two liquid substances. Laboratory examination.

Woman scientist mixing together two liquid substances. Laboratory examination.

Experiments in a chemistry lab. Young woman scientist mixing reagents from glass flasks

A woman in protective glasses is conducting experiments in the laboratory. Chemist is holding a jar of blue liquid and looking the reaction on the black background of the room