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#9Source metric 140 万热度
Original source Why didn't China's early sky observations develop into modern astronomy?
中国的天象观察很早便开始，为什么没发展成现代意义上的天文学？
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1 sources中国的天象观察很早便开始，为什么没发展成现代意义上的天文学？
A public trend signal observed across 1 source.