Ключевые слова: abstract, acid, air, background, biology, biotechnology, blister, blue, bubble, bunch, cell, cheerful, chemical, chemistry, clean, colorful, dairy, droplet, element, experiment, fluid, freshness, galactic, genetic, hormone, knowledge, laboratory, liquid, macro, medical, medicine, membrane, microscope, microscopic, minerals, model, modern, molecule, nature, organic, oxygen, pattern, pelt, planet, research, science, serotonin, structure, texture, water,