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中国的四大发明 （下） by Speak Chinese Naturally -Learn Chinese (Mandarin)

欢迎收听《自然而然说中文》，在这一期的节目里，你能够： 了解“中国四大发明”中的指南针和火药。 Support our work by joining our funding plan and access to 1,500 minutes+ transcriptions, including in this one at: https://speakchinesenaturally.com/