名词短语
中文翻译：比空气重的
同义词：
['heavier than air', 'heavier than the air例句：1. The balloon was filled with helium', 'which makes it lighter than air.（这个气球是用氦气填充的，所以它比空气轻。）']
例句：
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1. The balloon was filled with helium, which makes it lighter than air.
这个气球是用氦气填充的，所以它比空气轻。
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2.The spacecraft was designed to travel through the heaviest of atmospheres.
这个宇宙飞船被设计来穿越最厚重的大气层。
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3. The aircraft is heavier than the air, so it needs to be flown by a pilot.
这架飞机比空气重，所以需要由飞行员驾驶。