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http://brunelleschi.imss.fi.it/galileopalazzostrozzi/object/GalileoGalileiDrawingsOfTheSunspots.html
您即将离开知乎,请注意您的帐号和财产安全。
http://brunelleschi.imss.fi.it/galileopalazzostrozzi/object/GalileoGalileiDrawingsOfTheSunspots.html