四大发明

缩写：sdfm

拼音：sì dà fā míng

解释：纸﹑印刷术﹑指南针和火药，都由中国人发明，然后相继传入世界各地。是中国对于世界文明的四大贡献，通称四大发明。

更新时间：2024-10-05 17:09

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