【宇宙观察】远隔38万公里，从月球上看地球，为什么宇航员会感到害怕？
Synopsis
探索宇宙奥秘，普及科学知识！ 哈喽大家好！欢迎进入宇宙观察的频道，一个不止观察宇宙的宇宙旅行号！ 点击这里关注 ...
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