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.

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第一个部分是会展旅游的概念及特点。

Part one is the concepts and characteristics of MICE tourism.

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生态旅游的概念并不新奇。

The ideas behind ecotourism are not new.

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