Keywords
20-25 years, 20s, 25-30 years, adult, adults only, asian, asian ethnicity, black hair, button down shirt, casual clothing, chatting, chinese, chinese ethnicity, classroom, close-up, color image, education, expertise, formula, front view, holding, horizontal, indoors, learning, looking down, male, man, men, mixed race person, multi-ethnic group, only men, only young men, oriental, pacific islander ethnicity, photography, professional occupation, professor, shaved head, skill, skull, standing, student, sweater, talking, teaching, text, two people, waist-up, warm clothing, western script, whiteboard, young, young adult, young men, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, u17892988