A balloon can fly in the air because hot air rises.
气球能在天空飞是因为热空气会向上升。
He helps Bird to fly, using a balloon and some rope.
他用一个汽球和几根绳子，帮着小鸟起飞。
We also fly a hot air balloon to appreciate its Stunning and perfect sense of art.
我们还坐热气球从高空欣赏其震撼全貌和完美的艺术感。
The pilot tried to fly around that balloon for a while.
飞行员设法绕着气球飞了一阵。
If you had a hot air balloon, where would you fly?
如果你有一个热气球，你会去哪里？
I'm frightened to fly a hot-air balloon.
我害怕乘坐热汽球飞行。
I'm frightened to fly a hot-air balloon.
我害怕乘坐热汽球飞行。
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