Ключевые слова: acid, acidic, acidifier, additive, atom, atomic, background, biochemistry, biology, board, carboxylic, chemical, chemical compound, chemical formula, chemistry, citrate, citric, citric acid, citron, citrus, concept, crystalline, education, food, formula, fresh, fruit, handwritten, healthcare, ingredient, medical, medicine, metabolism, molecular, molecule, natural, nutrition, organic, pharmacology, science, slice, sour, sourness, structural, study, tart, taste, white, white board, written,