改英语作文.300字

题目

改英语作文.300字
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Nowadays,many things are still mysterious for human being and we are trying to find out the answer to all these questions.For example,do aliens exist?I totally believe that they live somewhere,because the universe is unlimited and scientists have a large number of evidences to explain their existence.
First of all,our planet is only a tiny point in the whole universe,so there may have other lives beyond the Earth.According to the astronomers’ estimation,there are over 100 billion other galaxies.This proves that the universe is immense.No one can deny the fact that other lives exist,because even the little sun galaxy has one planet that is inhibited.Moreover,after searching on Mars,scientist found out that there are some traces of water.This means that it is possible to have lives on it in the past.In this case,another planet shows the existence of extraterrestrials.Thus,why is it impossible to have another one in other galaxies?
Some people claim that no s

答案

Nowadays,many things are still mysterious for human being and we are trying to find out the answer to all these questions.For example,do aliens exist?I totally believe that they live somewhere,because...