Ключевые слова: biology, blackboard, cells, cellular, chemist, chemistry, class, classroom, closeup, coat, college, discovery, dna, education, elementary, enlarge, equipment, experiment, experiments, forensic, forensics, future, happy, investigate, lab, laboratory, learn, learning, lens, lesson, looking, man, medical, microscope, middle school, pathology, pupil, research, school, science, science and technology, senior, student, subject, teacher, test, tutor, use, vision, working,