Ключевые слова: advice, chemist, chemistry, college, confidence, doctor, education, experiment, expertise, explaining, gesture, glasses, instructor, intelligence, inventor, lab, laboratory, learning, lecture, mathematical, mathematician, medicine, old, physicist, pointer, pointing, presentation, professional, professor, science, scientific, scientist, seminar, senior, speaker, stick, study, studying, teacher, teaching, technology, training, university, white, wisdom,