原子核的体积大约是原子的一万亿分之一。
研究小组估计他们出错的机会小于万亿分之一。
The team estimates that the chance of their being wrong is less than one in a thousand trillion.
此研究能够解释大爆炸后第一万亿分之一秒内所发生的事。
The research could explain what happened in the first trillionth of a second after the Big Bang.
即一万亿分之一特斯拉，特斯拉是磁感应强度的计量单位。
根据期望值不同，这个值可以是万亿分之一，也可以是数百万。
Depending on what the expected value is, that could be trillionths or it could be millions.
差异大约是两千万亿分之一（十六位小数），太小而无法显示。
The difference is approximately 2 quadrillionths (sixteen decimal places), and is therefore too small to be shown.
而且蜜蜂能觉察到空气中浓度仅万亿分之一单位的特定化学物质。
The bees can detect the target chemicals in the air in concentrations as low as a few parts per trillion.
每立方空气中含有29到850微微克浓度。一微微克是一克的万亿分之一。
It was found in concentrations of 29 to 850 pico grammes per cubic metre of air. A micro gramme is one trillionth of a gramme.
大气中三氟化氮的浓度大约为0.5万亿分之一(ppt)，使得它很难测定。
The concentration of nitrogen trifluoride in the atmosphere is about 0.5 part per trillion, making it very hard to measure.
这种X光脉冲快门速度不到100飞秒（100飞秒= 万亿分之一秒的1/10）。
The X-ray pulses have a shutter speed of less than 100 femtoseconds (100 femtoseconds = 1/10 of a trillionth of a second).
这种方法能探测到脑细胞电活动发出的磁信号——一种信号的强度只相当于地磁场的一万亿分之一。
It detects magnetic signals that are produced by the electrical activity of brain cells—and which have about a billionth of the strength of the Earth's magnetic field.
Murphy博士在会议上说，迄今为止，这些实验仅仅是在10万亿分之一的概率上证实了等效原理。
So far, Dr Murphy told the conference, these experiments have merely confirmed the equivalence principle to one part in 10 trillion.
直到不久之前，对质子半径最好的测量是0.877飞米（千万亿分之一分尺），误差为在0.007飞米。
Until recently the best estimate of the proton radius was 0.877 femtometres with an uncertainty of 0.007 fm
一秒钟内可拍摄610万张照片，快门速度为440万亿分之一秒，在这么短的时间内光也只前进了不到一厘米。
It can take 6.1 million pictures in a single second, at a shutter speed of 440 trillionths of a second. Light itself moves just a fraction of a centimeter in that time.
但是走在路上的某个人看上去跟你一样的可能性，特别是8个面部特征都相同的人，这种可能性只有万亿分之一。
But the likelihood of someone walking around looking identical to you, specifically, in all eight facial features is only one in 1 trillion.
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.
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.
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.
2009年，并购交易发生额价值1.9万亿美元，比2008年下降了三分之一。
In 2009 M&A deals worth $1.9 trillion took place, down by a third from 2008.
再举另外一个例子，宇宙射线的波长不及万亿亿分之一英寸，而某些无线电波的波长却超过一英里！
As another example, cosmic rays have a wavelength of lessthan a millionth of a millionth of an inch, while some radio waves have wave lengths of over a mile!
美国前十大银行资产的另外三分之一是债券，总共拥有债券价值约合3.7万亿美元。 救援计划的剩余资金将用来购买这些债券。
The remainder of the scheme’s firepower will be directed at securities, which at $3.7 trillion comprise another third of the top-ten banks’ assets.
从2000年开始，美国的页岩天然气产量已经激增了十二倍，达到了4.9万亿立方英尺，大约占全国天然气总产量的四分之一。
Production has soared twelvefold since 2000, to 4.9 trillion cubic feet, or a quarter of the country's total gas output.
如此宽松的环境使得住房贷款在去年前十个月中便激增1万亿元，占同期新增贷款总额的三分之一。
Such lax lending has led to a Rmb1trn increase in housing loans in the first ten months of 2007, or nearly one-third of all new bank loans made during that period.
自2000年期其产量飙升至4.9万亿立方英尺，翻了12倍，相当于全国天然气输出的四分之一。
Production has soared twelvefold since 2000, to 4.9 trillion cubic feet, or a quarter of the country's total gas output.By 2035 the proportion could rise to half.
同时，家产超过500万美元的超级富豪占0.001%，他们的财富占据世界财富总量的五分之一，达到21万亿美元。
Meanwhile, the top 0.001 percent, ultra-rich households holding at least $5 million in assets, commanded $21 trillion -- a fifth of the world's wealth.
即使在六亿五千万可调利率次优贷款中有五分之一变成不良贷款，对于四十万亿美元的债务市场来说，不过是九牛一毛。
Even if a fifth of the $650 billion of adjustable-rate subprime loans went bad, that would be a blip in the $40 trillion market for debt.
出口占据了墨西哥万亿美元GDP的近三分之一，而且绝大部分是出口到美国。
Exports account for nearly a third of Mexico's trillion-dollar GDP, and most go to the United States.
出口占据了墨西哥万亿美元GDP的近三分之一，而且绝大部分是出口到美国。
Exports account for nearly a third of Mexico's trillion-dollar GDP, and most go to the United States.
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