2001年，丹尼斯·蒂托——一位富有冒险精神的百万富翁工程师——耗资2000万美元乘坐一艘俄罗斯宇宙飞船，自此太空旅游的概念深入人心。
The notion of space tourism took hold in 2001 with a $20 million flight aboard a Russian spacecraft by Dennis Tito, a millionaire engineer with an adventurous streak.
美国亿万富翁丹尼斯·蒂托是首位太空游客，日前他宣布赞助2018年载人登火星计划。
The American billionaire and world's first space tourist Dennis Tito has announced he will fund a manned mission to Mars in 2018.
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