Ключевые слова: artificial, backgrounds, biochemistry, biology, blackboard, chalk, chemical, chemistry, class, complexity, damage, danger, digitally, dioxin, drawing, education, environmental, formula, generated, healthcare, image, medicine, model, molecular, molecule, nobody, poison, pollution, school, science, sketch, structure, substance, symbol, teaching, tetrachlordibenzo, text, toxic, white, writing, yuschenko,