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随着计算机技术、大规模集成电路技术和高效编码技术以及高密度记录/重放技术的不断进步,直径12cm的CD影碟(VCD)已
With advances in computer technology, large-scale integrated circuit technology and high-efficiency encoding technology and high-density recording / playback technology, a CD disc (VCD) having a diameter of 12 cm has