Flying a hot air balloon is full of challenges.
驾驶热气球是一件充满挑战的事。
However, there is nothing more challenging to him than flying solo around the globe in a hot air balloon.
但对他来说，似乎没有什么比单人乘坐热气球环行地球更具有挑战性的了。
The hot-air balloon not only attaches wings to the flying dream, but also makes this dream appear more colorful and glorious.
热气球，不仅给人类的飞翔之梦插上了翅膀，而且将这个梦想点染得五彩缤纷、绚烂夺目。
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