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ͣƼ|ʱ䣺2012-4-12 07:46

ѧҵЫ·ɫԭЩ֪ǽԭȴһֱѧ硣

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ͣĺ|ʱ䣺2012-4-12 07:46

ֵ̨Զƺһ۾ʵֻһϵNGC 4151IJλһĺڶ໥á

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ͣƼ|ʱ䣺2012-4-12 07:45

ʷٷҡ(Stephen Hawking)ǵҪĹۺۼңΪΰĿѧңΪ֮ǰڽܲɷʱ͸¶Լѵʱ˼ĻŮˣԼ˽Ůˡ

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