People are wondering about if there are living creatures in other planets. Scientists have been searching for the answer all the time. Though the official never publishes any information about the existing of another life, most people believe that life exists in outer space. In the science fiction films, the directors try to search the space. They pictured the large galaxy and presented the audience how the aliens looked like. What's more, some documentaries also recorded the mysterious signs that seemed to be left by the unknown creatures. As a result, the public believes that aliens have come to our planet, or they just pretend to be someone else, studying about human beings. With the development of technology, someday the scientists can go much further and solve the riddles, at that time, we can know more about life.  
人们一直想知道在其他行星是否有生物存在。科学家们一直在寻找答案。尽管官方没有发布任何关于其他生命存在的信息，但是大多数人都相信在外太空是有生命存在的。在科幻电影中，导演们试图探索外太空，他们给观众刻画了大型星系和外星人的样子。而且，有些纪录片还记录了神秘的迹象，似乎是由未知生物留下的。因此，公众相信外星人来过地球，或者他们只是假扮成人类，在研究人类。随着科技的发展，总有一天科学家们能走得更远，解开谜底，那时，我们可以对生命有更多的了解。

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