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从概率的角度出发，地球真的只是宇宙中唯一有智慧生命的星球吗？
从人类慢慢的了解宇宙之后，科学家就在宇宙中不断的寻找智慧文明存在的证据，时至今日也没有任何的发现。那么从概率的角度出发，地球真的只是宇宙中唯一有智慧生命的星球吗？
《宇宙的奥秘》48/90
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