0.0-向全宇宙直播《天文学导论》-预告片
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向全宇宙直播：薛老师讲《天文学导论》。2022年9月7日起至年底，每周三晚19:30-21:55，我们不见不散哈。谢谢大家的关注与观看！The Universe, Yours to Discover!
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