Ключевые слова: adult, arm, background, black, blackboard, board, chalk, chalkboard, clear, colorful, communicate, communication, concept, conceptual, dark, drawing, eccentric, education, female, hand, holding, idea, indoors, learn, lesson, lively, manual, message, outdated, point, pointing, present, round, scribble, show, sketch, space, splash, teach, texture, touch, vivid, way, white, woman, work, write, writing, written, young,