在摆弄了10几年实验装置以后，Hinds博士的团队已经成功证明在千万亿分之一的精度下，电子的确是“完美”的球形。

After more than ten years of fiddling with their set-up, Dr Hines's team has succeeded in determining that the electron is round to within one part in a million billion.

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在讨论原子级别时间的时候，物理学家用起皮秒（百万兆分之一秒）甚至飞秒（千万亿分之一秒）来都没任何不便。 这是一方面。

Physicists have no trouble using, on the one hand, picoseconds (trillionths of a second) or even femtoseconds (quadrillionths of a second) to discuss time at the atomic scale.

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这种飞秒激光脉冲持续兆分之一秒(千万亿分之一秒)的时间，但是在其短暂的持续时间内，功率峰值可以达到北美电网功率相当的水平。

A femtosecond laser pulse lasts on the order of a quadrillionth of a second but reaches a peak power equivalent to that of the entire power grid of North America during its short burst.

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