translation.en: Optical character recognition units then only operated usually on one font, but by using charge-coupled device flatbed scanners and speech synthesizers, he developed a machine that could read any font.
translation.zh: 当时视觉文字识别系统 只能识别一种字体 但是通过运用感光扫描仪 和人工语音合成系统 他开发了一个可以阅读任何字体的机器