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臺灣籍旅美老師今天交給我們的句子是：
Also in contrast to a camera, your photoreceptors are unevenly distributed, with no receptors for dim light in the very center. This is why faint stars seem to disappear when you look directly at them.
另外一個眼睛和相機不同之處在于你的光感受器并不平均分布；在最中間的地方，沒有對昏暗光線的接收器。這就是為什么當我們直視微弱的星光時，星星會消失不見。
