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2009-01-01 00:00:00
China’s foreign Trade 2009年6期
A Chinese astronautics professor said on March 10 the country is capable of send-ing astronauts to moon around 2020.
\"The key technology problem is the 'returning'\"， said Xu Shijie， a professor from the Beijing University of Aeronautics， explaining that the country's three-stage moon mission could be defined as \"orbiting\"， \"landing\" and \"returning\".
