题目

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I think that the space of universe is quite big. It must have other organisms.
The mind of aliens maybe much clearer than that of us.
Therefore, I believe that UFO is certainly existent.

提问时间：2021-04-06

答案

I think that the space of universe is quite big.It must have other organisms.
-- other organisms -- other forms of organism.
The mind of aliens maybe much clearer than that of us.
-- The minds of aliens may be much clearer than those of us.
Therefore,I believe that UFO is certainly existent.
-- Therefore,I believe that UFO does certainly exist.(UFO certainly eixists.)