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迄今为止,地球是人们所知的唯一一个有生命的星球。地球与其他星球有什么不同呢?Is Earth the only planet with life?We don’t know if that’s true.Scientists have been trying to find life elsewhere in the universe for a long time,but they haven’t so far.Why does Earth have life?Life can survive(活下来)only where there’s liquid water.
So far, the Earth is the only living planet known to people. Is Earth the only planet with life? We do not know if that’s true .cientists have been trying to find life elsewhere in the universe for a long time, but they have not so far. Why does Earth have life? Life can survive (only where there’s liquid water.