翻译主题：四大发明

China is well known for its introduction of ways and means to help ease the life of mankind. Among the inventions of Ancient China, four emerged as great contributions to the developments and changes not only to the country, but also to the world’s economy and culture. The Great Four Inventions of ancient China were papermaking, commercial printing, gunpowder, and the compass. China’s four great ancient inventions made tremendous contributions to the world’s economy and the culture of mankind. They were also important symbols of China’s role as a great world civilization.