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<正>Earth,as seen from a million miles away,on July 6,2015.A NASA camera on the Deep Space Climate Observatory satellite has returned its first view of the entire sunlit side of Earth.This color image of Earth was taken by NASA’s Earth Polychromatic Imaging Camera(EPIC),a four-megapixel CCD camera and telescope.The image shows North and Central America.Once the instrument begins regular data acquisition,EPIC will provide a daily series of Earth images,allowing—for the first time—study of