The mankind has marched into the 6th decade of outer space exploitation, and the manned space flight has made a history of 50 years.
人类和平利用外空已近60年，载人航天也走过了50年的历程。
The mankind has marched into the 6th decade of outer space exploitation, and the manned space flight has made a history of 50 years.
人类和平利用外空已近60年，载人航天也走过了50年的历程。
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