A third is certain basic chemicals such as carbon, oxygen and nitrogen.
第三种是某些基本的化学物质，如碳、氧和氮。
A century earlier, Henry Cavendish had noted the existence of a residual gas when oxygen and nitrogen are removed from air, but its importance had not been realized.
一个世纪前，亨利·卡文迪什注意到当空气中的氧气和氮气被除去，还有其他剩余气体存在，但人们还没有认识到它们的重要性。
What about between the carbon and nitrogen?
那么碳和氮之间呢？
Task: Recover phosphorus and nitrogen from wastewater to make fertilizer.
目的：利用废水回收磷、氮，生产化肥。
If it were not for oxygen and nitrogen in the air, no man could live on the earth.
大气中如果没有氧和氮，人就无法生存于地球了。
Electric power plants that burn fossil fuels release hydrocarbons and nitrogen oxides.
通过燃烧矿物发电的火力发电厂会释放碳氢化合物和氮氧化物。
For example, we can talk about nitrogen, and nitrogen has five valence electrons shown here.
例如，我们可以讨论氮原子，氮原子有5个价电子。
Renewable diesel also creates far fewer sulfur dioxide, particulate, and nitrogen oxide emissions.
同时，可再生柴油排放的二氧化硫物、颗粒物和氮氧化物等要小得多。
The surfactant itself also burns without creating emissions beyond water, carbon dioxide and nitrogen.
表面活性剂本身燃烧时除了生成水、二氧化碳和氮气之外，不会生成其他的排放物。
Oil producers are searching for more efficient ways to strip sulphur and nitrogen from their products.
石油生产商们正在寻找更有效的办法从石油产品中清除硫氮化合物。
This false color image combines emission from ionized hydrogen in blue, oxygen in green, and nitrogen in red.
这张照片并非肉眼所见的颜色，而是离子化氢呈蓝色、氧呈绿色、氮呈红色的画面。
Other filters and chemical "scrubbers" catch oxides of sulphur and nitrogen that would otherwise cause acid rain.
其他的过滤器以及化学“捕捉器”负责处理能够引起酸雨的硫氧化物和氮氧化物。
Auroras happen when ions in the solar wind collide with atoms of oxygen and nitrogen in the upper atmosphere.
极光的出现缘于太阳风离子与高层大气中的氧氮原子的碰撞。
Although climate change gets ample attention, species loss and nitrogen pollution exceed safe limits by greater degrees.
虽然气候变化引起了足够的重视，然而物种灭绝和氮污染的程度已经十分严重。
The cause is unclear, but rising ocean levels and nitrogen dumped from the New York City sewer system are likely culprits.
造成这种现象的原因仍不明朗，但是海平面的日益增长和纽约下水道系统倾倒的氮化合物是可能的元凶。
The spectrum reveals emission from oxygen and nitrogen but no hydrogen, a rare set of signals from within globular clusters.
频谱显示出氧和氮，但没有氢，一个球状星团内罕见的信号。
Black carbon is not emitted alone, but mixed with other things-organic molecules and various oxides of sulphur and nitrogen.
黑碳并不是单独被排放的，它被排放的同时还混合了许多别的物质——比如，有机分子还有各种各样的硫氧化物和氮氧化物。
A study showed the devices are on par with traditional mechanical treatment facilities for removing organic compounds and nitrogen.
研究显示，在消除有机化合物和氮含量方面，该设备与传统机械处理设施的处理能力相当。
The pair considered three aspects of global livestock production: greenhouse gas emissions, biomass consumption and nitrogen emissions.
两位研究人员考虑了全球畜牧业生产的三个方面：温室气体排放，生物质消耗和氮排放。
Believe it or not, nettles are fussy about where they grow - in fact, they need a soil rich in phosphates and nitrogen to really thrive.
信不信由你，荨麻对它们生长的土壤很挑剔。事实上，它们的繁荣生长需要富含磷酸盐和氮的土壤。
Heterotrophic bacteria eat most of the carbon-based materials in raw sewage while autotrophic bacteria consume ammonia and nitrogen compounds.
异养细菌可以吃掉未处理污水当中的大部分碳基物质；而自养细菌则会消耗掉氨氮化合物。
But the new study shows that the ratio of oxygen and nitrogen isotopes found in the solar wind is different from the ratio here on earth, or on the moon or Mars.
不过这一最新的研究发现，太阳风当中的氧和氮同位素比例与地球、月球或火星上的比例不同。
The fungus, recently discovered in Iran, grows naturally in crude oil and removes the sulphur and nitrogen compounds that lead to acid rain and air pollution.
最近，在伊朗发现了一种在原油中自然生长的真菌，可清除石油中导致酸雨和空气污染的硫氮化合物。
The shuttle launch originally scheduled for 1 November has been pushed back by one day due to helium and nitrogen leaks on space shuttle Discovery, NASA says.
NASA称：原定于11月1日发射的发现号航天飞机因氦氮泄露推迟一天发射。
So in terms of the first step of skeletal structure, this is actually going to be easier because we don't have a central atom, we just have carbon and nitrogen here.
对于第一步画出骨架，其实比刚才更容易,因为我们没有一个中心原子，我们这里只有碳和氮两个原子。
The formation of all the other elements - including the carbon, oxygen and nitrogen needed for life - will emerge with the first massive stars millions of years later.
而其它元素-包括碳、氧、以及生命所需营养物质元素，要等到几百万年以后随着第一批恒星形成才会出现。
The formation of all the other elements - including the carbon, oxygen and nitrogen needed for life - will emerge with the first massive stars millions of years later.
而其它元素-包括碳、氧、以及生命所需营养物质元素，要等到几百万年以后随着第一批恒星形成才会出现。
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