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拼音：sān dà fā míng
注 音：ㄙㄢ ㄉㄚˋ ㄈㄚ ㄇㄧㄥˊ
繁体字：
◎ 三大发明 sān dà fāmíng[the three major inventions by the Chinese——gunpowder, printing and compass] 中国古代的三种大的发明:火药、活字印刷和指南针
