Ключевые слова: art, background, bilingual, billboard, black, blackboard, board, chalk, chalkboard, characters, check, chinese, choice, class, concept, dirty, education, english, erased, grundge, grunge, hand, handwriting, holding, knowledge, language, learn, learning, lesson, letter, letters, love, message, no war, old, peace, school, sign, smudged, teaching, text, texture, tick, translation, used, white, word, words, write,