Starszy wykładowca trzymając kawałek kredy i szukasz drogi - Zdjęcie stockowe & obraz

Grey hair professor pointing on something at lecture hall

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

Senior lecturer leaning on table and looking away

Senior lecturer pointing on something in lecture room

Smiling grey hair professor holding piece of chalk

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Grey hair professor pointing on something at blackboard

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

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Elderly man in bow tie and blue jacket using smartphone isolated on grey

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Excited senior man in bow tie pointing with fingers at camera isolated on grey

Smiling senior man holding medical mask isolated on grey

Confused senior man showing dubium gesture while looking at camera isolated on grey

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