Mosolyog a szürke haj professzor előadóterem állt és nézett kamera - Stock fotó és kép

Grey hair professor sitting on table in lecture room and holding book

Smiling grey hair professor sitting on table in lecture room

Senior lecturer leaning on table and looking away

Senior lecturer holding piece of chalk and looking away

Grey hair professor pointing on something at lecture hall

Smiling grey hair professor holding stack of books with apple on top

Senior lecturer pointing on something in lecture room

Smiling senior lecturer standing in classroom and looking at camera

Happy bearded speaker in glasses talking near microphones and brick wall

Adult son and senior father sitting on sofa and looking at camera at home

Handsome grey hair man sitting in armchair, holding old photos and looking away

Handsome grey hair man holding book and looking at camera at home

Elderly man in shirt and jacket using smartphone isolated on grey

Smiling senior man looking at camera while touching jacket isolated on grey

Positive senior man talking on smartphone and pointing with finger isolated on grey

Smiling man in beige jumper and eyeglasses talking on cellphone isolated on grey