Sound films became possible through the developments pioneered by lee DE forest who exhibited brief sound films to the public in1923.
福雷于1923年为公众放映了简短的有声片，由他引起的一系列发明使有声片最终成为现实。
Sound films became possible through the developments pioneered by lee DE forest who exhibited brief sound films to the public in1923.
福雷于1923年为公众放映了简短的有声片，由他引起的一系列发明使有声片最终成为现实。
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