The light, as always, was beyond compare and there was a watery chill in the air.

光线一如既往地无与伦比，空气里还有潮湿的寒意。

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One source of error is refraction, the bending of light beams as they pass through air layers of different temperature and pressure.

误差的一个来源是折射，即光束通过不同温度和压力的空气层时发生的弯曲现象。

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As the scientists explain, moving objects with light can be done using the photophoresis effect in air and other gases.

这些科学家解释说，利用空气和其他气体中的光脉现象可以实现用光移动物体。

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These features permitted as much air flow and natural light as possible.

VOA: special.2009.08.21

Cashmere, after all, should be soft but rugged, have real weight but feel light as air.

WSJ: Men's Fashion: Cashmere Confidential

I've flipped thousands of those light-as-air, moist and slightly tart pancakes over the years, and they still have a hold on me.

NPR: Sourdough: More than a Bread

As a result there is very little scattering of light as it passes from the air into the layer of nanotubes.

BBC: Carbon nanotubes experiment results