实际上，利用“表面增强拉曼光谱”的设备能够检测到十亿分之一的痕量物质。
In fact, a device using "surface-enhanced Raman spectroscopy" can detect traces of less than one part per billion.
这种打破了物理定律的不正常现象持续了十亿分之一秒的十亿分之一的十亿分之一。
This anomaly, which breaks the laws of physics, lasted a billionth of a billionth of a billionth of a second.
根据最新的研究结果，HD 209458目前一天大约损失80000磅(36000千克)的物质，即每年十亿分之一的地球。
HD 209458b is losing about 80, 000 pounds (36, 000 kilograms) of mass a day-or about a billionth of Earth's mass every year, according to the new research.
因此，时间和时间的相对性可以用任何沙漏、闹钟或原子钟来测量，其中原子钟可测量出十亿分之一秒。
Thus time and time's relativity are measurable by any hourglass, alarm clock, or atomic clock that can measure a billionth of a second.
穿过芯片的电子可以“识别”某一磁场，该磁场每隔几百纳米(十亿分之一米)就变换一次方向。
Electrons flowing through the chip would "see" a magnetic field that flips from one direction to the opposite every few hundred nanometres (billionths of a metre).
如果灵魂请求“回去”，它就会立刻被“送回”到物质世界…… 在它“死亡”的十亿分之一秒前到达。
而现在的晶体管尺寸可用十亿分之一米（纳米）计算。
Now the size of transistors is measured in billionths of a metre.
这种病症发生的几率被认为是在十亿分之一左右。
The odds of having both diseases are thought to be about one in a billion.
他描述了有十亿人居住的棚户区，而这些棚户区预期在2050年会有三十亿人居住(三分之一的人口)。
He captures the shantytowns where a billion people live now, and where three billion (a third of humanity) are expected to be living by 2050.
纳米碳管的直径仅有一米的十亿分之一长，是最理想的金属针。
Carbon nanotubes, which are just billionths of a metre across, seemed the perfect needle.
水滴的直径可微小至一纳米（一米的十亿分之一）。
The water droplets themselves can be as small as a nanometre (a billionth of a metre) across.
关键点是虽然电极和电解质显然是固态的，它们事实上却具有完美的纳米(一纳米即十亿分之一米)构造。
The crucial trick is that although both the electrodes and the electrolyte appear solid, they are actually finely structured at the nanometre scale (a nanometre is a billionth of a metre).
研究者制造这些新物质的方法已日渐明朗，他们将在以十亿分之一米计量的纳米级别上进行创造。
The way researchers will construct these materials is now becoming clear.They will engineer them at the nanoscale, where things are measured in billionths of a metre.
在光子晶体中，其成分与光的波长是同样的大小——几百纳米(一米的十亿分之一)。
In a photonic crystal the elements are about the same size as the wavelength of light-a few hundred nanometres (billionths of a metre).
研究者制造这些新物质的方法已日渐明朗，他们将在以十亿分之一米计量的纳米级别上进行创造。
The way researchers will construct these materials is now becoming clear. They will engineer them at the nanoscale, where things are measured in billionths of a metre.
大多数被创造出来的新元素在衰变以前只能存在十亿分之一秒。
Most of the new elements that get created like this last billionths of a second before they disintegrate.
作为对比，木星的亮度也只有我们的太阳的十亿分之一。
By comparison, Jupiter is one-billionth the brightness of our sun.
现在许多炒作都是围绕纳米这一技术做文章—其想法是通过操控十亿分之一米尺度的物体可以生产出有用的产品。
Much hype has surrounded the idea of nanotechnology-the thought that manipulating objects on scales of a billionth of a metre will produce useful products.
量子点是一些微型晶体，材质为几十个原子宽，或几纳米(一米的十亿分之一)宽的半导体材料。
Quantum dots are tiny crystals of semiconducting material just a few tens of atoms, or a few nanometres (billionths of a metre), across.
但是经过上述实验后，两个钟表的时间差距不到十亿分之一秒，所以需要用两个非常精准的钟表。
However, after the experiment described above the difference in time between the two clocks was less than a billionth of a second, which is why very accurate clocks were needed.
研究人员在漆黑的实验室里聚集了细小到只有一米的十亿分之一个的纳米物质的扁平带子 。
Researchers assembled flat ribbons of nanoparticles - tiny bits of matter only billionths of a meter long - in a darkened laboratory.
日冕的电离气体（又叫等离子体）不仅非常炙热，而且异常稀薄，其密度还不到组成太阳主体的氢气密度的十亿分之一。
As well as being very hot, the ionised gas of the corona (called plasma) has a superthin consistency. It is less than a billionth of the density of the hydrogen that makes up the main ball of the Sun.
在实验的过程中，研究人员发现这些粒子的用时比光要少了几十亿分之一秒。
In the course of doing the experiments, the researchers noticed that the particles showed up a few billionths of a second sooner than light would over the same distance.
使用这些校验和算法中的一种可以将程序遭受意外破坏的机率降低到少于十亿分之一(尽管故意攻击仍有可能)。
Using one of these checksum algorithms reduces the chance of accidental corruption to less than one in a billion (though deliberate attacks are still a possibility, as you'll see).
与在电极上凿孔不同的是，他们在电极上覆盖一层碳纳米管，每个只有5纳米(十亿分之一米)宽。
Instead of digging holes in the electrodes, they are coating them with a forest of carbon nanotubes, each five nanometres (billionths of a metre) wide.
但此设计要求硅片厚度不超过5纳米(一米的十亿分之一)。
But the design requires that this silicon layer be no more than five nanometres (billionths of a metre) deep.
世界卫生组织对此持相同看法，并表示如果不对猪流感进行有效防控，那么感染人群将会达到世界人口的三分之一——二十亿。
The World Health Organisation concurred, saying that if unchecked, swine flu could affect almost a third of the population – 2 billion people.
世界卫生组织对此持相同看法，并表示如果不对猪流感进行有效防控，那么感染人群将会达到世界人口的三分之一——二十亿。
The World Health Organisation concurred, saying that if unchecked, swine flu could affect almost a third of the population – 2 billion people.
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