比空气轻

lighter-than-air───比空气轻

into thin air───adv.无影无踪

larger than life───比生命高贵；大于生命

light air───一级风；软风

light quanta───光量子

light therapy───[临床]光疗法，光照疗法；光线疗法

lighten the mood───舒缓情绪；放松心情

lighter flint───打火石

lighter flints───打火机

What thing is lighter than air that any person can hold in a second or in a minute but never in an hour?───什么东西比空气还轻，任何人只能抓住一秒或一分钟但是不能抓住一小时？

In addition to being lighter than air, Helium is incredibly useful, scientifically, in its liquid form!───除了轻过空气外，在科学上液氦的作用简直令人难以置信。

Lighter than air, but harder to breathe.───轻于空气，但难以呼吸。

Birds are sensitive to methane gas, which when released from the air floats upward as it is lighter than air.───鸟类对甲烷很敏感，因为甲烷比空气轻，释放出来的时候会向上漂浮到空气中。

The Man Angel was lighter-than-air and had paddles like a rowboat that the aviator could pump.───“人类天使”比空气还轻，并且有着类似于小船的桨，飞行员可以驱动这些桨。

In nature, lighter-than-air volcanic lava traps bubbles of various sizes as the molten rock cools.───自然界中，比空气还轻的各种火山灰在冷却过程中变为海底火山岩。

This water vapor (a gas ), being lighter than air, rises until it reaches the cold upper air where it condenses into clouds.───这些水蒸气（一种气体）由于比空气轻，会上升直至达到高空冷气层，并在那里凝结成云。

RICHARD ROBINSON The magic wand becomes lighter than air in this exclusive clip from Robinson's Magic Stick dvd.───在这段视频中，魔杖变得比空气还要轻……

Then you wear a halo of candyfloss, a glutinous helmet, lighter than air.

He once tried to fly by hyperventilating himself until he was convinced he was lighter than air.

Being both lighter than air and nonflammable, helium is used to inflate balloons and airships.

But I have some secret bubble of amusement in me and it's lighter than air.

Firstly, gas is lighter than air and leakages dissipate in the atmosphere rather than forming a local hazard.