A nanosecond is one-billionth of a second.

1纳秒为十亿分之一秒。

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By comparison, Jupiter is one-billionth the brightness of our sun.

作为对比，木星的亮度也只有我们的太阳的十亿分之一。

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A nanometer is one one-billionth of a meter or about 100, 000 times smaller than the width of a human hair.

一纳米是一米的一百亿分之一，或者比一根人的头发要小十万倍。

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Broadly speaking, nanotechnology describes work on materials whose critical dimensions are measured in nanometers, or one-billionth of a meter.

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Nanotechnology is the science of the very small, where machines and materials are built at the molecular level, and key components are measured in nanometers, or one-billionth of a meter.

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The one-billionth CER was issued on September 7th.

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