挪威北部斯瓦尔巴群岛上的齐柏林研究站上周记录的二氧化碳气体水平最高值超过397个百万分点，比2008年的水平增加了2.5个百万分点。
Levels of the gas at the Zeppelin research station on Svalbard, northern Norway, last week peaked at over 397 parts per million (PPM), an increase of more than 2.5ppm on 2008.
赢得Mega Millions头奖的几率约为一亿七千六百万分之一，而个人被雷击中的几率为七十五万比一，我们可以两相比较一下。
The chance of winning the Mega Millions jackpot is about one in 176m. For comparison, an individual’s chance of being struck by lightning is around one in 750,000.
光速行走这样的距离需时0.0024秒，但是这些中微子却比光速快了60纳秒，也就是百万分之60秒到达目的地。
Light would have covered the distance in around 2.4 thousandths of a second, but the neutrinos took 60 nanoseconds - or 60 billionths of a second - less than light beams would have taken.
导致这一现象的原因可能就是大气层中温室气体浓度增加引起的气候变化，目前大气层中的温室气体浓度已经从1700年的280ppm增加到现在的390ppm (ppm意为百万分之一，大概是指体积的比)。
The reason may well be climate change caused by increasing concentrations of atmospheric greenhouse gases-now roughly 390 parts per million, up from 280 PPM in the 1700s.
氨气和硫化氢气都是有害气体，而且比二氧化碳的危害更大，特别是氨气在空气中的含量要限制在百万分之十五以下。
Ammonia gas and hydrogen sulfide is harmful gas, and more harmful than carbon dioxide, especially ammonia in the air to limit the content below fifteen over one million.
此参数指定一个最高和最低频率偏差，以百分比表示或百万分之的。
This parameter is specified with a maximum and minimum frequency deviation, expressed in percent or parts per million.
Bacon说在加拿大西部，跟据地区的不同，豌豆通常只含比耐受水平百万分之0.3低的硒元素，而有的地区则会高于这个水平。
Bacon said depending on the region of Western Canada, the peas generally can contain less than the 0.3 parts per million tolerance level while in other parts it is above that level.
在过去的五十年里——只比百万分之一地球年龄的百分之一多一点——大气中的二氧化碳浓度开始反常地迅速上升。
Within the last 50 years - little more than one hundredth of a millionth of the Earth's age - the carbon dioxide in the atmosphere began to rise anomalously fast.
在过去的五十年里——只比百万分之一地球年龄的百分之一多一点——大气中的二氧化碳浓度开始反常地迅速上升。
Within the last 50 years - little more than one hundredth of a millionth of the Earth's age - the carbon dioxide in the atmosphere began to rise anomalously fast.
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