Ключевые слова: black, blackboard, bright, brilliant, bulb, business, chalk, chalkboard, concepts, conceptual, copy, creative, creativity, discovery, drawing, education, electricity, energy, equipment, glow, idea, illuminate, imagination, innovate, innovation, inspiration, intelligence, intelligent, lamp, learn, light, lightbulb, line, power, school, science, sign, simplicity, smart, solution, solutions, space, sparse, successful, symbol, think, thinking, wisdom,