Ключевые слова: beaker, biology, bottle, business, businessman, chemist, chemistry, cure, demonstrate, drug, education, employee, equipment, essence, essential, flask, fluid, glass, hand, holding, industry, ingredient, laboratory, lesson, liquid, man, manager, medical, medicinal, medicine, mix, mixture, oil, pill, presentation, product, reagent, sample, school, science, scientist, showing, teacher, test, tincture, try, vial, water, worker,