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11 天
宝藏心语丨昼夜等长 白天才懂夜的黑
中国古代利用日影测定时刻的计时器。“晷”字,古意是太阳的影子。圆形石盘,盘上刻出时刻,中间立金属晷针,和盘面垂直。晷盘斜置在汉白玉石座之上,利用太阳的投影与地球自转所形成的日影长短的变化及方向的不同确定时刻。用于宫殿前亦有皇权的象征,一般与嘉量并列于 ...
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11 天
宝藏心语丨昼夜等长 白天才懂夜的黑
中国古代利用日影测定时刻的计时器。“晷”字,古意是太阳的影子。圆形石盘,盘上刻出时刻,中间立金属晷针,和盘面 ...
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