ADJ having a density greater than that of air 比空气重的
But it is worth remembering that just over a century ago, heavier-than-air flight seemed an impossible dream.
但是值得回忆的是仅仅在一个世纪以前，重于空气的飞行似乎是个不可能实现的梦想。
On December 17, 1903, the Wright Brothers embarked on the first sustained, heavier-than-air, man-powered flight aboard the Wright Flyer.
1903年12月17日，莱特兄弟驾驶自己制造的第一架飞机“飞行者1号”，在美国北卡罗莱纳州的基蒂霍克海滩，进行了首次有动力驱动的持续飞行。
Carbon dioxide in pure form can asphyxiate because it is heavier than air.
因为二氧化碳比空气要重，纯净的二氧化碳可以使人窒息。
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