The magnet creates a field that changes the polarity of a tiny, tiny portion of the metal particles which coat each platter's surface.

这个磁体创建一个磁场，能改变覆盖在磁盘表面的小金属粒子的极性。

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They seem to be metal particles that move along certain paths.

看起来是一些沿特定路径移动的金属微粒。

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A nanoparticle array consists of metal particles with a diameter of 0.5-5 nanometers.

一个纳米颗粒组合由直径在零点五到五纳米的金属粒子组成。

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The magnet creates a field which changes the polarity of a tiny, tiny portion of the metal particles which coat each platter's surface.

这个磁体创建一个,能改变覆盖在,磁盘表面小金属粒子的磁极。

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Basically what he did is he took a very thin metal foil and he bombarded it with charged particles.

简单的说他做的工作是,用一张非常薄的金属箔,然后用带电的粒子轰击它。

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Only time will tell if other kinds of devices are at risk from those little metal particles that tainted many a laptop cell, but if we had to proffer a guess, we'd say it's pretty unlikely that the QA breakdown which allowed so many batteries to become fire hazards was limited only to the manufacturing processes for notebook power packs.

ENGADGET: CPSC: Sony recall will include laptop batteries only

Nano bar codes are the molecular versions of traditional bar codes--metal nano-particles that have specific, recognizable chemical fingerprints that can be read by a machine, perhaps a UV lamp or optical microscope.

FORBES: Safer And Guilt-Free Nano Foods

They expected to find a high metal content among the larger particles - PM10s and PM 2.5s, but it surprised them to find such high levels in even the very smallest ones.

BBC: Railway tracks