Ключевые слова: arm, background, body, caucasian, clear, closeup, communicate, communication, concept, counting, detail, digits, expression, extension, finger, fingers, gesture, hand, human, index, indicate, isolated, language, light, message, middle, natural, neutral, nonverbal, number, numbers, part, pinky, raised, represent, ring, shadows, showing, sign, simplicity, skin, soft, straightforward, three, thumb, tucked, understanding, upright, visibility, wrist,