为促成一次核爆炸，临界质量必须在一百万分之一秒内聚集在一起。
In order to make a nuclear explosion, the critical mass must come together within a fraction of a millionth of a second.
从重量为百万分之一克的样品中提取有关行星宏观组成的信息是一个极为有趣的科学尝试实例。
Extracting information about the large-scale composition of a planet from a sample weighing a millionth of a gram was a fascinating example of scientific endeavour.
纳米晶体，也被称为量子点，是一种直径只有百万分之一毫米的半导体粒子。
Nanocrystals, also known as quantum dots, are semiconducting particles with a diameter of a few millionths of a millimeter.
虽然大多数致病突变在人类中发现的概率为千分之一到百万分之一，但基础突变发生的几率可能高得多。
While most disease-causing mutated are found in humans at a rate of one in a few thousand to one in a few million people, founder mutation can occur at much higher rates.
假设一年内发生同等规模事故的可能性为百万分之一。
Suppose that his estimate is correct, in the sense that the probability of an accident of this magnitude in any year was one in a million.
现在水平的温室气体是大约430个百万分之一。
通常，大多数颗粒的直径在50至100微米(米的百万分之一)之间。
Most ash particles are normally 50-100 microns (millionths of a metre) across.
艾滋病毒或者丙肝病毒检验呈阳性的血液数量降到了两百万分之一。
The number of blood units found to be positive for HIV or hepatitis C virus was decreased to one per two million.
此外，他还制造了一个地球形状的汽车房屋，大小正好占地球体积的百万分之一。
Hamad constructed a motor home in the shape of a giant globe which is exactly 1 millionth the size of the actual earth.
成品能以六赫兹的频率运行，约是典型手提电脑运行速度的百万分之一。
The result runs at six Hertz, about a millionth of the speed of a typical laptop computer.
不列颠哥伦比亚地区在雨水中监测到低于导致甲状腺疾病当量百万分之一的辐射量。
Radiation in rainwater in British Columbia was less than one millionth the amount shown to cause thyroid diseases.
加利福尼亚提出的健康目标是要将由可能由六价铬引起癌症风险降低到百万分之一。
California's proposed health goal is designed to limit possible cancer risk to just one in a million for those exposed to hexavalent chromium.
这一过程应用了少量的自然出现的矿物质去增加浓度，不超过百万分之一。
The process USES small amounts of the naturally occurring mineral to increase concentrations to no more than one part per million typically.
病毒很难被发现，其中一个原因是因为他们都很微小——通常只有百万分之一英寸大小。
One reason that viruses can be so hard to find is that they're so small - typically a few millionths of an inch across.
垫圈表面的标准光洁度最大为125- 200百万分之一英寸粗糙度。
Standard finish of gasket surface is 125-200 micro-inch maximum roughness.
那家伙说NBA球员是一百万分之一，我说，男人，看，我要一百万分之一。
The guy said NBA players are one in a million, I said, Man, look, I'm going to be that one in a million.
埃长度单位，等于一厘米的百万分之一(10 - 8)，用来记录辐射波长。
A unit of length equal to one hundred-millionth (10-8) of a centimeter, used especially to specify radiation wavelengths.
它的亮度仅为光球的百万分之一，只有在日全食时或用特制的日冕仪才能看见。
The brightness of its light ball only parts per million, and only in the total solar eclipse or with a special instrument to see the corona.
他学会了在千分尺上辨识一百万分之一英寸，会用镶嵌着金刚石的工具制作砂轮。
He had learned to read the millionths of an inch on the micrometer and to shape the grinding wheel with an instrument set with a diamond.
他的确能做到：相比之下，iPhone高清屏幕的像素约80微米(一米的百万分之一)。
He will have to: a pixel on a high-resolution iPhone screen, by comparison, is about 80 microns (millionths of a metre) across.
科学家将研究分析微波背景辐射中几百万分之一的温度变化，看是否能从中找出它的这些特性。
They will examine temperature variations in the microwave background amounting to a few millionths of a degree, to see whether they can discern such features in it.
谷粒大小的尺寸被测量是一米的百万分之一，但是浪漫的旅行的传授花粉是史诗的。
The size of the grains is measured in millionths of a meter, but the romantic journeys of pollen are epic.
电子束的波长远小于可见光，这允许科学奖能观测1纳米（一微米的百万分之一）左右物体的结构。
The wavelength of these electron beams is much shorter, allowing scientists to see structures as small as 1 nanometre (1 millionth of a millimetre).
我们鼻子能够（7）察觉到细微的人体气味，即使这种气味（8）微弱到总量的百万分之一。
Our noses are capable of 7 human smells even when these are 8 to far below one part in one million.
这孩子幸运地活了下来——这样的几率只有百万分之一啊！不过手上留下了一道三寸上的伤疤。
The teenager survived the strike, the chances of which are just 1 in a million - but with a nasty three-inch long scar on his hand.
超级百岁老人(即年龄超过110岁的人)更加稀少--在此类人群中的比例仅为七百万分之一。
Supercentenarians, or individuals that are older than 110, are even rarer—only one in seven million fall into this category.
一秒钟内，一个细胞要执行约一千万次耗能化学反应，而统共仅需要约1皮瓦(百万百万分之一瓦)能量。
In one second, a cell performs about 10 million energy-consuming chemical reactions, which altogether require about one picowatt (one millionth millionth of a watt) of power.
一秒钟内，一个细胞要执行约一千万次耗能化学反应，而统共仅需要约1皮瓦(百万百万分之一瓦)能量。
In one second, a cell performs about 10 million energy-consuming chemical reactions, which altogether require about one picowatt (one millionth millionth of a watt) of power.
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