Keywords
40s, 45-50 years, 50-55 years, 50s, asian ethnicity, biology, black hair, chemist, color image, document, expertise, file, front view, glasses, healthcare and medicine, hi-tech, hi-technology, holding, indoors, japanese ethnicity, lab coat, laboratory, looking at camera, male, man, mature adult, mature men, one adult only, one person, pen, photography, portrait, research, scientist, small group of objects, technology, three objects, vertical, waist up, white background, writing, 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, u21612665