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迄今为止,人类似乎一直孤独地生活在小小的地球上。我们很难确认,在无边无际的银河系中,在遥远的宇宙深处,是否还有另外的智慧生命像我们一样学习
So far, humanity seems to have lived alone on a tiny earth. It is hard to confirm whether there are other intelligent life in the boundless Milky Way in the distant universe that learns like us