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[高清字幕]Science Report - Kelly and Kornienko Land on Solid Ground

来源:慢速英语   时间:2016-03-22 08:46:28

Science Report - Kelly and Kornienko Land on Solid Ground

American Scott Kelly and Russian Mikhail Kornienko spent a record 340 days in space. It is the longest time humans have stayed in the International Space Station. NASA is using observations on humans from this trip for its Journey to Mars program.

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