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参考翻译:
Four great inventions of China include the compass,gun powder,the paper-making technique and the printing technique.They are one of the marks that China occupies an important position in the history of human civilization.The first compass was invented during the Warring States Period.It was a simple device employing natural magnets to identify directions.Gunpowder was invented in Sui and Tang Dynasties and was mainly used in military areas.The paper-making technique was developed by Cai Lun in the Eastern Han Dynasty,making paper a commonly used writing material.The Printing technique,also called movable type printing,promoted the spread of culture significantly.The four great inventions of China made tremendous contribution to the development of the world's economy and the progress of the culture of mankind.
