The first vehicles to navigate the air were balloons.

首次在空中航行的飞行器是气球。

《新英汉大辞典》

Along the way are tales of kings and queens, hot air balloons and monkeys in space.

一路上都有国王，皇后，热气球和太空猴子的故事。

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When the lanterns are lit, they slowly rise into the air like small hot air balloons for all to see.

当灯笼被点亮时，它们就像小热气球一样慢慢升到空中，供所有人观赏。

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The balloons contain helium and oxygen so that they float around with the air currents.

VOA: special.2010.09.05

Customers requested that desirable signatures be found, or, more fancifully, the addition of horses and hot air balloons.

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Attendees recited the Pledge of Allegiance and sang the national anthem, and some children released balloons into the air.

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Until Tuesday's incident, the deadliest accident in recent memory happened in 1989, when 13 people were killed as two hot air balloons collided in Australia.

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