名词短语
中文翻译：Unknown
同义词：
['gas-filled balloon', 'gas-tight balloon', 'gas-inflated balloon']
例句：
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1. The gas-inflated balloon was released into the sky.
这个充气的气球被放飞到天空中。
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2.The gas-filled balloon floated up to the top of the tree.
充满气体的气球飘到了树顶。
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3. The gas-tight balloon was carefully inflated before being used.
在使用时，这个密封的气球被小心地充气。