名词
中文翻译：热空气
同义词：
['warm air', 'heated air例句：1. The hot-air balloon drifted slowly towards the horizon.（热气球缓缓飘向地平线。）']
例句：
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1. The hot-air balloon drifted slowly towards the horizon.
热气球缓缓飘向地平线。
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2. The hot-air balloon was filled with a mixture of gases.
热气球内充满了气体混合物。
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3. The hot-air balloon was released into the sky.
热气球被释放到天空中。