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光纤——连接你和远方的ta
你半夜说的情话，瞬间就能穿到ta的手机里。打开短视频app，轻轻松松就能看到世界各地人们的生活。把你，和全球其他人连在一起的，是光纤。（出品：科普中国-星空计划）
科普中国 星空计划123/251
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