Keywords
20s, 25-30 years, 30s, 40s, 45-50 years, 50-55 years, 50s, adults only, asian ethnicity, assistant, biology, black hair, chemist, color image, document, electronic microscope, expertise, explaining, female, file, glasses, head and shoulders, healthcare and medicine, hi-tech, hi-technology, horizontal, indoors, japanese ethnicity, lab coat, laboratory, laboratory equipment, looking, male, man, mature adult, mature men, medium group of objects, pen, photography, professor, research, scientist, sheet, side view, small group of people, talking, teaching, technology, two people, waist up, woman, writing, young adult, young women, 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, u12268152