Keywords
40 to 49 years, 45 to 49 years, accuracy, adult, alone, biologist, biology, blur, chemistry, clear, close, close-up, complexity, concentration, day, detail, differential focus, droplet, educate, educating, education, ethnic, experiment, eyewear, flask, focus, focus on foreground, focus techniques, goggles, guardian, hispanic, hispanic ethnicity, indoors, lab technician, labor, laboratory, latin, latin american, learning, liquid, looking, male, man, mask, mature adult, mature man, older, one person, only adults, only mature men, only men, only one adult, only one man, only one mature man, paying attention, pipette, protection, protective clothing, protective mask, research, researcher, safe, safety, safety goggles, science, scientist, shallow focus, shape, single, staring, studying, technology, test, tests, transparent, tube, tube shape, using, view, view point, volumetric flask, work, working, 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, is09a8l6v