氮的这种放射性形式在自然界中不会产生。
如果我来看那些氮的振动能级。
应该是氢的还是氮的？对，应该是氮的。
Is it going to be hydrogen or nitrogen? Yup, it's going to be nitrogen.
是氢的键更短，还是氮与氮的三键更短？
Is a hydrogen bond shorter, or is a nitrogen-nitrogen triple bond going to be shorter?
他们正在修饰基因以增强作物抗旱和吸收氮的能力。
Their genes are being tweaked to increase the plants' drought-resistance and improve their absorption of nitrogen.
育种或基因改造可以增加动植物吸收氮的效率。
Breeding or genetic modification could increase the efficiency with which animals and plants take up nitrogen.
其中70%是由甲烷和一氧化二氮的排放造成的。
70% of this was caused by methane and nitrous oxide emissions.
与此同时，燃烧化石燃料也有增加氮的氧化物的趋势。
Burning fossil fuels tends to oxidise nitrogen at the same time.
氧气充足的条件下，微生物生成一氧化二氮的速率很低。
Under well-oxygenated conditions, microbes produce N2O at low rates.
手术结束后，拿液态氮的学生告诉我肉瘤几天后就会脱落。
The student with the nitrogen finished up and told me the wart would drop off after a few days.
氨是化肥的原料，和几乎所有含有胺，或氮的东西的原料。
And ammonia becomes the feedstock for fertilizers, for almost anything that contains an amine in it, or a nitrogen in it.
来自农业的活性氮的排放是最棘手的，因为它们的来源很分散。
Reactive nitrogen emissions from agriculture are the most intractable as they come from many diffuse sources.
氮肥的使用造成氧化亚氮的排放(一种威力强大的温室气体)。
Emissions of nitrous oxide (a very powerful greenhouse gas) caused by the application of nitrogen fertilisers.
手术之前，患者会吸入这些混合着氧气或一氧化二氮的麻醉气体。
Before a procedure, patients inhale these gasses, which are mixed with either oxygen or nitrous oxide.
这意味着氮的电子亲和能很低，它实际上并不愿意得到一个电子。
So this means nitrogen has low electron affinity, it doesn't actually want to gain an electron.
令人担忧的是，根据大多数预测所示，活性氮的生产还在呈增加趋势。
What is worrying is that the production of reactive nitrogen is set to increase according to most predictions.
因为大海里氮的供应是很有限的，更多的氮就可以引起巨大的激化作用。
Because there is only a limited supply of nitrogen out in the open ocean, additional amounts of it can have a huge stimulating effect.
专家们说相关辐射危险性很小，因为氮的同位素氮16只会存在5秒钟。
Experts have played down the dangers, arguing that the isotope of nitrogen known as nitrogen-16 lasts for only five seconds.
但当氧气浓度下降到缺氧的水平，这些水域就会增加一氧化二氮的生成。
But at oxygen concentrations decrease to hypoxic levels, these waters can increase their production of N2O.
那么，在这种情况下，我们看到氮的形式电荷是负的，而在这种情况下，氧的是负的。
So, in this case, we see that our formal charge is negative on the nitrogen, in this case it's negative on oxygen.
甲烷和一氧化二氮的排放主要是农业活动的结果：一氧化二氮源于化肥而甲烷主要来自奶牛。
The emission of methane and nitrous oxide is largely the result of agricultural activities; nitrous oxide from fertilisers and methane mostly from cows.
在20世纪，工业化合成氮的发明使指生产军火和肥料成为可能，进而导致了粮食的急剧增长。
The invention of a process to synthesise nitrogen cheaply into ammonium, a fertiliser, paved the way for the huge increase in food production in the 20th century.
像高兰尼一样，约翰逊利用特制的取样器测量全年排放的二氧化碳、甲烷和一氧化二氮的含量。
Like Gollany, Johnson USES the specialized Chambers to measure the levels of carbon dioxide, methane, and nitrous oxide released throughout the entire year.
他们发现，溪流中一氧化二氮的数量与人类活动释放到环境中的氮有关，如使用化肥和污水排放。
They found that the amount of nitrous oxide produced in streams is related to human activities that release nitrogen into the environment, such as fertilizer use and sewage discharges.
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。
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。
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.
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