A nucleus is about one billionth the size of an atom.

原子核的体积大约是原子的一万亿分之一。

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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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The centimeter - gram - second electromagnetic unit of inductance, equal to one billionth a Henry.

电磁亨利厘米-克-秒制中感应系数的电磁单位，相当于一亨利的十亿分之一。

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Their new drug is a nanoparticle, measuring about one billionth of a metre.

BBC: lungs

The iPod digital music player is a huge hit, with more than 42 million units sold, and in February 2006, Apple's iTunes Music store sold its one billionth song.

FORBES: 20 Great Moments In Apple History

Scientific discoveries at nanoscale -- one billionth of a meter -- are finding their way out of the lab and into production, creating more efficient computer chips and coatings for glass.

CNN: Organic by design