这种雏形设备由纳米银颗粒和用在喷墨打印机上的其它材料制成，并与天线和其它组件配合使用，可以从稀薄的空气中获取能量。

That's because the prototype gadget, which works with an antenna and other components, made with nanoparticles of silver and other materials on an inkjet printer, can draw energy out of thin air.

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我喝了一杯咖啡，去了一趟洗手间，更新了在计算机上运行的软件，仍然什么也没有发现；第二辆车不知去向，仿佛从稀薄的空气中蒸发掉了。

I had gotten a cup of coffee, used the restroom, ran an update on the computer software and still nothing; the second van had disappeared into thin air.

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1867年，大不列颠研究员James Clerk Maxwell想知道能否从稀薄的空气里提炼出有用的能量。这明显与热力学第二定律相矛盾。

In 1867 James Clerk Maxwell, a British researcher, wondered if you could extract useful energy from thin air, in apparent contradiction to the second law of thermodynamics.

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