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本書以世界上最大的單口徑射電望遠鏡——中國天眼為主題，用兒童的視角呈現這項大國工程從選址到建成的過程。歷時二十餘年，經過無數人的努力，500米口徑球面射電望遠鏡於2016年落成啟用，中國人從此睜開「天眼」看宇宙。
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