单词heavier-than-air
网络: 比空气重的；重于空气航空器
Spills would also be a health risk, since carbon dioxide is heavier than air, and so can build up in low-lying or poorly ventilated spots.
二氧化碳泄漏会带来健康风险。由于二氧化碳比空气重，因此可以在低洼地区和通风差的地区累积。
With a wing and one refers to one or more with the engine, relying on its own power to fly in the atmosphere heavier than air aircraft.
指具有机翼和一具或多具发动机，靠自身动力能在大气中飞行的重于空气的航空器。
People called the Wright brothers mad but it did not stop them from becoming the first men to construct and fly a heavier-than-air craft.
人们说莱特兄弟疯了，然而这并没阻止他们成为最早建造并驾驶比空气更重的飞行器的人。
Any of various winged vehicles capable of flight, generally heavier than air and driven by jet engines or propellers.
各种能够飞行的带翼交通工具，通常比空气重，用喷气式发动机或螺旋桨驱动
I say "catastrophic" because carbon dioxide is heavier than air, and a ground-hugging cloud would suffocate anyone it enveloped.
我用到“灾难性”一词，是想说二氧化碳比空气质量重，当二氧化碳形成的云层过重，空气锐减，所有下面的人都会窒息而死。
Some gases used are not necessarily toxic, but can be heavier than air, thus displacing oxygen and creating a breathing safety hazard.
测试中使用的某些气体未必有毒，但可能比空气重，因此可能取代氧气并带来安全呼吸危险。
Therefore, a precise definition of the aircraft is: there is a power-driven aircraft, fixed wing aircraft and is heavier than air.
因此飞机的精确定义就是：飞机是有动力驱动的有固定机翼的而且重于空气的航空器。
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。
That day they became the first people to demonstrate sustained flight of a heavier-than-air machine under the complete control of the pilot.
他们在那天也率先成为完全掌控这架比空气还重的机器而持续飞行的人。
Because CO2 is 40% heavier than air, placement of exhaust vents at or near ground level is recommended when blasting in an enclosed area.
因为CO2比空气重40%，所以在封闭区域进行喷射时，建议将排气孔放置在地面上或接近地面的位置。