A few years ago, scientists discovered another type of light-sensitive cell in the eye.
几年前,科学家在眼睛里发现了另一种类型的光敏感细胞。
Electronic engraving Printing plate engraving with a stylus controlled by a light sensitive cell scanning the original.
电子雕刻用光扫描器扫描原稿,然后由光电池控制的钢针雕刻,造成印版。
Electronic engraving Printing plate engraving with a stylus controlled by a light sensitive cell scanning the original.
电子雕刻用光扫描器扫描原稿,然后由光电池控制的钢针雕刻,造成印版。
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