Ключевые слова: accomplishment, achievement, agent, answer, broker, business, businessman, concept, earth, ecological, environment, environmental, estate, global, globe, guarantee, housing, keep, key, keyhole, know, knowing, knowledge, lock, lockup, market, mortgage, opportunity, planet, potential, power, protect, real, safe, safekeeping, secure, security, solution, sphere, success, successful, unknown, unlock, up, world, worldwide,