一个空的电子阅读器和一个满的电子阅读器相比，差距仅有十的负十八次方克。
The difference between an empty e-reader and a full one is just one attogram.
根据加州大学伯克利分校的教授约翰·库比亚托维兹所说，下载满容的电子书阅览器与空的阅览器相比，差距仅有1微微微克，也就是10-18 克（十的负十八次方克）。
According to John Kubiatowicz, from the University of California, Berkeley, the difference between an empty e-reader and a full one is just one attogram, or 10-18 of a gram.
十八到二十四个月的实际负利率，是成为这两个国家增长速度大幅度上升、同时也是石油使用量大幅度上升的原因之一。
Eighteen to twenty-four months of negative real interest rates contributed to the sharp increase in growth rates in both countries and, simultaneously, to sharp increases in oil usage.
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