In order to make a nuclear explosion, the critical mass must come together within a fraction of a millionth of a second.
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。
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.
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。
The poisoning is relatively rapid and a millionth of a gram is sufficient to kill.
中毒的全过程相当迅速，只要沾染上百万分之一克的有毒物质便会迅速送命。
The Hubble Space Telescope completed its one millionth scientific observation in July.
今年7月哈勃望远镜完成了第1百万次科学观测。
That means the difference between the two is only one-third % of a millionth of a percent.
意味着,二者之间的差别仅是,百万分之三分之一。
The University of Michigan alone scanned its millionth book for the project back in February 2008.
单单密歇根大学参与计划扫描的一百万册图书已经在2008年2月送回了该校。
By the pigeonhole principle, two of those turkeys must have the same weight to the nearest millionth.
根据鸽子洞原理，其中的2只火鸡体重最接近于精确到百万分之一磅的数值。
Canon is celebrating the production of its 40 millionth EOS camera, including both film and digital SLRs.
佳能公司庆祝其EOS单反相机生产过四千万，其中包括胶卷单反和数码单反。
The site counted its 3 millionth user in August, less than two months after it passed the 2 million mark.
网站的游戏功能则促进了Foursquare的快速成长，截止到八月份，网站用户已经达到了300万人，相距200万用户记录前后不到两个月。
Water droplets in fog are very small, typically between 1 to 50 microns (one-millionth of a metre) across.
雾气中的水滴极小，通常在1 -50微米(一百万分之一米)之间。
The technology is producing cells that are often only two microns thick (a micron is one-millionth of a meter).
这项技术制造的电池厚度通常仅仅是两微米(一微米是一个百万分之一米)。
Mr Thompson made the comments in a blog post to mark what the company claimed was its 100 millionth subscriber.
汤普森先生在一篇纪念公司用户突破一亿的博客文章中发表了上述评论。
Despite being available only in America, and having been on sale just four weeks, Apple sold its millionth iPad.
尽管iPad只允许在美国销售，且刚刚销售4周，苹果公司已经卖出iPad 100万台。
Radiation in rainwater in British Columbia was less than one millionth the amount shown to cause thyroid diseases.
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。
One demographer has said the 300 millionth person would likely be a Latino boy given current U.S. population trends.
美国一位人口统计学家曾说，从目前美国的人口走势来看，这第三亿个人可能会是一个拉丁裔男婴。
Performing 1 million transactions a second does not mean each transaction can be performed in a millionth of a second.
每秒执行一百万个事务并不意味着每个事务都可以在一百万分之一秒内执行完。
Hamad constructed a motor home in the shape of a giant globe which is exactly 1 millionth the size of the actual earth.
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。
Beijing Capital International Airport welcomed its 60 millionth passenger in 2009 Monday, a record for a Chinese airport.
11月30日，首都国际机场迎来今年第6000万名旅客，创造中国机场年旅客吞吐量新纪录。
In the UK drinking water can contain no more than 100 micrograms of THM per litre. A microgram is one millionth of a gram.
在英国每升饮用水中三卤甲烷（THM）不允许超过 100 微克（一微克是一克的一百万之一）。
So it's much more common to see microfarads (one-millionth of a farad) and even picofarads (one-millionth of a microfarad).
所以微法拉（百万份之一法拉）和皮法拉（百万份之一微法拉）更为常见。
A US-based language monitoring group crowned Web 2.0 as the one-millionth word or phrase in the English language yesterday.
美国一家语言监测机构昨日认定Web2.0为英语中第100万个词汇，而一些语言学家认为这是在玩噱头。
Next they had to decide on a "natural" length. They chose one ten-millionth of the distance from the Equator to the North Pole.
接下来他们必须决定一种“自然的”长度，他们选择了从赤道到北极距离的一千万分之一，他们将它称作一米。
For a taste of Wikipedia's future look, either log in on the site or check out our screenshot below of the 3 millionth article.
如果你想知道Wikipedia未来的模样如何，那么请登录网站或查看下文中第300万篇文章的截图。
To put that into some sort of perspective, a micro-metre is a millionth of a metre; the width of a human hair is about 100 micro-metres.
没错，一微米是一百万分之一米，人类头发的宽度大概是100微米。
It recently shipped the fifty-millionth BlackBerry, and sales hit a record of 7.8 million devices in the fourth quarter, beating estimates.
最近黑莓的总销量达到了5000万部，08年4季度创纪录地实现了780万部，远超预期。
The world's largest social networking site announced Wednesday that it has hit a widely anticipated milestone, signing up its 500 millionth user.
全球最大的社交网站周三宣布终于达成5亿用户，标志着一个里程碑的诞生。
The wavelength of these electron beams is much shorter, allowing scientists to see structures as small as 1 nanometre (1 millionth of a millimetre).
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。
Chemists discovered the eighteenth millionth chemical substance known to science on June 15, 1998. Many thousands more have been developed since then.
到1998年6月15日时，化学家已经发现1800万种化学物质，之后又发现成千上万种新物质。
Chemists discovered the eighteenth millionth chemical substance known to science on June 15, 1998. Many thousands more have been developed since then.
到1998年6月15日时，化学家已经发现1800万种化学物质，之后又发现成千上万种新物质。
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