So nitrogen fertilizer needs to be applied in large area in planting eucalyptus.
因而种植桉树需要大面积施加氮肥。
As a lump of coal which has been in contact with oxygen for centuries without burning will combine with it when once ignited, so nitrogen, excited by electricity, will burn.
一块暴露在空气中几世纪没点燃过的煤炭，当他点燃时便会与它结合，所以说氮，在电流的刺激之下，可以燃烧。
The poor soil of bogs, for example, offers little nitrogen and phosphorus, so carnivorous plants enjoy an advantage over plants that obtain these nutrients by more conventional means.
例如，沼泽贫瘠的土壤提供的氮和磷很少，所以肉食植物比那些通过更传统的方式获得这些营养的植物更有优势。
Carnivorous plants are so finely tuned to low levels of nitrogen that this extra fertilizer is overloading their systems, and they eventually burn themselves out and die.
肉食性植物能很好地适应低浓度氮，因此这些额外的肥料会使它们的系统负担过重，最终它们会被压垮并死亡。
So, in this case, we see that our formal charge is negative on the nitrogen, in this case it's negative on oxygen.
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 it looks a lot less messy if we just draw our Lewis structure like this for h c n, where we have h bonded to c triple bonded to n, and then a lone pair on the nitrogen there.
这看起来整洁了不少,如果我们把氰化氢的路易斯结构画成这样的话，这样我们就有氢与碳之间的单键和碳与氮之间三键，然后还有一对孤对电子在氮这里。
So after each layer is deposited, nitrogen fluoride is pumped into the chamber and is split to release highly reactive fluorine atoms that clean the walls.
所以在每层材料放置好之后，氮氟化物就被泵进工作舱中并分散开来，释放出高活性的氟原子来清洁墙壁。
So in one case, we could actually put carbon in the middle, in one place, we could put sulfur in the middle, and in one case we could put nitrogen.
那么有一种情况是，我们把碳放在中间，还有一种情况是，把硫放在中间，另外一种情况是把氮放在中间。
So this means nitrogen has low electron affinity, it doesn't actually want to gain an electron.
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 Professor Galloway and other researchers have developed a nitrogen footprint calculator.
因此，加洛韦教授和其他研究人员开发出一种氮足迹计算器。
All our suppliers say they cannot get potash and they cannot get phosphorous and, of course, nitrogen is mostly imported into this country right now, so we have to depend on foreign sources for that.
我们所有的供货商都说，他们手里没有钾肥、磷肥，而美国大部分氮肥目前要靠进口，所以我们得靠从国外进货才行。
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。
So too is the nitrogen cycle, which converts pure nitrogen from the air into useful chemicals, and which mankind has helped speed up by over 150%.
氮循环也一样，它将空气中的纯氮转化成有用的化合物，而人类使其加速了150%以上。
We know nitrogen bonds multiple bonds, so let's look at nitrogen.
我们了解氮气中有多重键，我们看看氮气。
And we're going to ask the question, so I take nitrogen, I take some, hydrogen, I mix them together in a container.
我们接下来会问一些问题，我们有氮气，氢气，把它们混合。
So, nitrogen is shown here, we know that because it has 7 electrons.
那么这里显示的是氮，我们能看出来是因为它有七个电子。
So what we see is that the formal charge on the nitrogen is 0.
因此我们看到氮的形式电荷是零。
Anammox bacteria transform ammonia to nitrogen in fewer steps than more common bacteria, and require much less oxygen, and therefore energy, to do so.
anammox菌在把氨转化为氮时比其它普通菌的步骤少并且所需氧量少，从而使得能耗也较低。
So, if we took the case of nitrogen, if we add an electron to nitrogen and go to n minus, we find that the change in energy is 7 kilojoules per mole.
如果我们以氮为例，如果我们给氮增加个电子令它变成-1价的氮，我们会发现能量的变化是，7，千焦每摩尔。
So in our first structure, we would find for the nitrogen we have a formal charge 5 minus 4 minus 2, because we're starting with 5 valence electrons, so that is a formal charge of minus 1.
那么在我们的第一个结构中，我们发现氮的形式电荷量是五减去四4,再减去二，因为我们开始有五个价电子，因此它的形式电荷量是负一。
Triton is so cold that most of its nitrogen is condensed as frost, making it the only satellite in the solar system known to have a surface made mainly of nitrogen ice.
海卫一温度极低(约为- 235摄氏度，一个大气压下- 210度左右氮气凝固——译者注)，以至其大部分的氮气都凝聚到了其表面形成霜，这使海卫一成为太阳系内唯一一颗以“氮冰”为主要地表成分的星球。
The body is freeze-dried in liquid nitrogen, then vibrated so that it dissolves into a fine powder. Further processes evaporate water and remove things like mercury.
它将经过液氮冷冻干燥后的尸体进行振动，尸体便溶解为超微粒，然后近一步蒸发掉水并去除像汞之类的物质。
Professor Boehman would like to see more research done so we can know for sure if (and how much) additional NOx pollution is caused by the use of nitrogen-enriched gasoline.
铂尔曼教授还表示，他希望看到更多的研究，以明确添氮汽油的使用到底会产生多少氮氧化物。
So, when the Earth gravitational magnetic field puts a barrier in front of the floor of the plasma of the Sun, the product is nitrogen.
因此，当地球的磁引力场体在太阳的等离子体前面创造出一个壁垒，其产物就是氮。
Mainly because of rising inflation pressure gas inside the womb, so, the summer to tire filling dry nitrogen is right choice.
胎压升高主要由于胎内气体膨胀，所以，夏季给车胎充干燥氮气是不错的选择。
Energy accounts for about three-quarters of the cost of producing nitrogen fertilisers, so cheaper gas and proximity to America's many farmers make Terra an attractive buy.
能源约占氮肥生产成本的四分之三，因而对美国许多农民来说，天然气之类产品较为便宜的价格使美国Terra公司成了一个有吸引力的商品。
So, for example, down here I wrote that it was n 2 and that it was h 2, but when I re-wrote the molecules up here, you saw that it's an h h single bond where it's a nitrogen-nitrogen triple bond.
比如，在这下面我写的是氮分子2,而这个是氢分子，但我在上面把这些分子的形式改写了，大家可以看到,这是一个氢与氢之间的单键，含一个氮与氮之间的三键。
So, for example, down here I wrote that it was n 2 and that it was h 2, but when I re-wrote the molecules up here, you saw that it's an h h single bond where it's a nitrogen-nitrogen triple bond.
比如，在这下面我写的是氮分子2,而这个是氢分子，但我在上面把这些分子的形式改写了，大家可以看到,这是一个氢与氢之间的单键，含一个氮与氮之间的三键。
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