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1.The patient's retrograde vision was so severe that he could not see the objects clearly.
病人的倒退视觉非常严重，以至于他看不清物体。
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2. The astronaut had to use a special device to correct his retrograde vision during long-duration space missions.
宇航员在长时间的太空任务中不得不使用一种特殊的设备来纠正他的倒退视觉。
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3. The scientist discovered that certain chemicals can cause retrograde vision, which is a conditionwhere the brain interprets images in reverse order.
科学家发现某些化学物质会导致倒退视觉，这是一种大脑将图像解读为反向顺序的条件。