比较符合当前的太空旅游方案显示，这个数学，可准确的。

Comparison with the current space tourism programme suggests this maths may be accurate.

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另外，Kayak提供了一些高级旅行规划、预定和管理功能，能提供给用户全面、精确而又灵活的旅游方案。

Additionally, Kayak offers advanced travel planning, booking and management features, which offer users a comprehensive, accurate and flexible solution to travel.

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