Want concentration of CO2 in atmosphere lowered from 380 to 350 parts per million.
希望将大气中二氧化碳含量由百万分之380降低到百万分之350。
The level of carbon dioxide in the atmosphere is measured in parts per million (PPM).
大气层里二氧化碳含量的测量单位是ppm，即一百万体积的空气中所含二氧化碳的体积数。
A normal amount of CO in your blood is extremely low — zero to eight parts per million.
血液中CO普通含量相当低——零至百万分之八。
In the past decade, the fatal accident rate for airlines hasn't been higher than 0.6 per million flights.
过去10年以来，客机致命事故一直没有超过每百万架次0.6的失事比率。
These levels are comparable to the 500 to 1000 parts per million of water in the Earth's upper mantle.
这一水分含量堪比地球的上层地幔500到1000ppm的水含量。
Hitherto diesel contained up to 500 parts per million (ppm) of sulphur, but the new rules limit sulphur to 15 ppm.
目前，柴油中硫含量为500ppm，但新规定将其限制在15ppm。
23 out of 28 products – 82 percent – contained formaldehyde at levels ranging from 54 to 610 parts per million (ppm).
28件产品中的23件 - 82% -甲醛含量在54至610百万分率(ppm)之间。
Gun murders are consequently rare, at just over one killing per million people per year, one of the lowest rates in the rich world.
由是英伦的枪杀案很少见，每年每百万人死于枪击的人数才刚过1人，是发达国家中枪杀率最低的国家之一。
A commonly cited goal is to stabilize GHG concentrations around 450-550 parts per million (PPM), or about twice pre-industrial levels.
一个共同的目标是使温室气体在空气中的浓度稳定在450- 550ppm(注二)，或者大约两倍于工业化前的水平。
Current methane concentrations in the Arctic average about 1.85 parts per million, the scientists said, the highest in 400,000 years.
目前在北极地区甲烷浓度平均为大约百万分之1.85，科学家们说，这是40万年中的最高水平。
The technology is said to have an average detection rate of 96% and a low rate of false alarms: a mere five per million, according to tests by the ISO.
据说该技术的平均检出率高达96%并且虚报率低：根据ISO的测试，每一百万仅仅出现五次虚报。
Our planet has always harbored water. The rubble that coalesced to form Earth contained trace amounts—tens to hundreds of parts per million—of the stuff.
虽然地球上的岩石或多或少都含有一定量的水，但是科学家认为这些水不足以形成今天的海洋，因此他们将目光转向太空，去寻找海洋的起源。
At 250 parts per million CO2, the shellfish grew vigorously, and at 750 PPM and higher they were crippled, feeble creatures with thin shells and weak connective tissues.
在CO2含量为百万分之250时，甲壳类生物生长得很好，而到了百万分之750或更高时，它们的甲壳变薄、连结物质变弱，成了残破而虚弱的生物。
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.
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)。
Atmospheric concentrations of carbon dioxide have reached 386 parts per million-and rising, because every year, human activity spews more than 30 billion metric tons of CO2.
目前大气中CO2(二氧化碳)的浓度已达百万分之386，而且还在上升。因为每年，人类活动要排放出300多亿吨CO2。
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.
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。
If we continue to burn fossil fuels at current rates, levels of carbon dioxide in the atmosphere will reach 550 PPM (parts per million) — double pre-industrial levels — by around 2050.
如果我们继续按照目前的标准使用矿物燃料，到2050年全球大气中的二氧化碳含量将达到550ppm(百万分率)。这个数字是人类进入工业化社会前的两倍。
Gun murders are consequently rare, at fractionally over 1 each year per million people, one of the lowest rates in the developed world (for comparison, America's figure is 27 per million).
在英国枪杀案因此显得极其罕见，每百万人一年只发生略多于一起，是其中一个枪杀率最低的发达国家（与其相比，美国枪杀率高达百万分之27）。
Shell's overall safety performance, as measured by reported injuries per million work hours, was slightly better than BP's, but it has for years suffered a higher fatality rate than its peers.
如果用每百万工时报告的工伤数字做比较，壳牌公司的整体安全记录略好于英国石油公司。但是多年来，壳牌公司的死亡率总是高于同业公司。
Dr Saido said that samples of seawater collected from the Pacific Ocean were found to be contaminated with up to 150 parts per million of some of these components of plastic decomposition.
Saido博士说，从太平洋搜集的海水样本的污染物浓度高达百万分之一百五，污染物多是塑料垃圾的分解物质。
Studies suggest that seasonal influenza vaccines could sometimes be associated with an increased risk of Guillain-Barré syndrome on the order of one to two cases per million vaccinated persons.
研究提示季节流感疫苗有时伴有Guillain-Barré综合症大约每百万接种者1-2例，有增加的危险。
The pre-industrial carbon dioxide amount was 280 parts per million (ppm). Humans, by burning coal, oil and gas, have increased this to 385 ppm; it continues to grow by about 2 ppm per year.
在前工业时代，二氧化碳含量为280ppm，人类燃烧煤炭和油气的行为使其上升到385ppm，而这一数值还在以每年2ppm的速率增长。
The pre-industrial carbon dioxide amount was 280 parts per million (ppm). Humans, by burning coal, oil and gas, have increased this to 385 ppm; it continues to grow by about 2 ppm per year.
在前工业时代，二氧化碳含量为280ppm，人类燃烧煤炭和油气的行为使其上升到385ppm，而这一数值还在以每年2ppm的速率增长。
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