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nitrogen

TPO词频:40次
nitr
o
gen产生

[ˈnaɪtrədʒən]


【释义】

基本释义 n. 氮

常考释义 n. 氮

n. 氮(化学元素)【化】

【TPO例句】

1. But nitrogen is an unstable element.(TPO31-L4)

但是,氮是种不稳定的元素。

2. So the transfer of this nitrogen to the forest is important. (TPO52-L2)

所以这个把氮元素转移到树木的过程很重要。

3. Plants absorb this nitrogen which they need to grow. (TPO52-L2)

植物吸收了这些它们生长所需的氮元素。

4. Now, salmon contain nitrogen.  (TPO52-L2)

大马哈鱼富含氮元素。

n. 氮

【TPO例句】

1. The growth of organisms is dependent on the availability of nutrients, none of which is more important than nitrogen. (TPO53-P2)

有机体的生长取决于营养素的可获得性,其中没有一种比氮更重要。

2. Although there is an abundant supply of nitrogen in Earth’s atmosphere, it cannot be absorbed by plants unless it is “fixed,” or combined chemically with other elements to form nitrogen compounds. (TPO53-P2)

虽然地球大气中氮气供应充足,但除非固定,否则不能被植物吸收,或与其他元素化学结合形成含氮化合物。

3. Nitrogen-fixing bacteria help tropical rain forest plants cope with the poor soils there by supplying them with needed nitrogen. (TPO53-P2)

固氮菌帮助热带雨林植物通过向它们提供所需的氮来应对那里的贫瘠土壤。

4. Nitrogen fixation by free-living bacteria in tropical soils is also beneficial.(TPO53-P2)

热带土壤中自由活菌的固氮作用也是有益的。

5. But before we go into that, let’s look at the role of nitrogen fertilizer in modern farming. (TPO53-L2)

但是在我们讲这个之前,让我们看一下氮化肥在现代农业当中的重要作用。

6. But these legumes also enriched the soil by converting nitrogen in the atmosphere into nitrates, a form of nitrogen that crops like wheat or corn could use as nutrient. (TPO53-L2)

但是这些豆科植物通过把空气中的氮转化为硝酸盐也在给土壤补充营养,像小麦或者玉米这样的农作物都可以用硝酸盐作为营养物。

7. They stored much of the surplus nitrogen during the time of the year when the runoff tended to be the greatest.(TPO53-L2)

他们在一年中径流最多的时候存储大量的氮。

8. And the excess nitrogen once trapped by these cover crops either washed away in the next big rain or went down into the groundwater and either way eventually ended up in the streams and the bay, and that as we said means more algae in the water and less oxygen for the fish and other aquatic life to breathe.(TPO53-L2)

被覆盖作物存起来的大量的氮要么在下一场雨中被冲走要么流到地下水中,最终都会进入溪流和河湾。而这个,像我们刚说过的,意味着水中有更多的海藻和更少的氧气供鱼和其他水生生物呼吸。 

9. Other kinds like rye and barley that hold the nitrogen and keep it from washing out of the soil during the months when that most likely to occur. (TPO53-L2)

其他种类像黑麦和大麦能够固定氮并防止氮最大程度的从土壤中流失。

10. The roots of these trees can absorb the excess nitrogen in the runoff before it reaches the streams. (TPO53-L2)

在径流到达溪水之前,这些树木的根能够吸收其中的氮。

11. So the transfer of this nitrogen to the forest is important. (TPO52-L2)

所以这个把氮元素给到树木的过程很重要。

12. The art of farming was careful soil selection, that is, knowing which soils were light and easily cultivable, could be readily turned with small hoes, and would maintain their fertility over several years' planting, for cereal crops rapidly remove nitrogen and other nutrients from the soil. (TPO52-P3)

农业的艺术就在于小心地选择土地,那就是说,知道哪些土壤是轻土壤,容易耕种,很容易用小锄头翻种,并且可以在经过几年的耕种之后,仍然保持它的肥力,因为谷类植物会迅速地消耗氮和土壤中其他的养分。

13. The bacteria that legumes host within their root nodules (small swellings on the root) change nitrogen gas from the atmosphere into nitrogen compounds that plants are able to metabolize, a process, known as nitrogen fixation, that makes the soil more fertile.(TPO36-P1)

其他的微生物在土壤发育过程中也十分重要。

14. Two additional kinds of evidence support the hypothesis that petroleum is a product of the decomposition of organic matter: oil possesses optical properties known only in hydrocarbons derived from organic matter, and oil contains nitrogen and certain compounds believed to originate only in living matter. (TPO43-P2)

另外还有两类证据证实了石油是一种有机物的分解产物的假说:一是石油具有一些光学特性,这些特性只有来源于有机物的碳氢化合物才有,二是石油还含有氮和某些化合物,这些化合物被认为只能来源于有生命的物质。

15. You see, horse manure, horse waste is rich in phosphorus and also nitrogen compared to normal soil.(TPO31-L4)

你们知道的,比起普通的土壤来说,马匹排泄物种有大量的磷和氮。

16. The soil from the Botai settlement sites was found to have high concentrations of phosphorus and low nitrogen concentrations, which is important since it suggests that what we’ve got is really old, not something added to the soil more recently.(TPO31-L4)

在波泰人定居的遗址的土壤中发现了高浓度的磷和低浓度的氮。这个是非常重要的发现,因为它意味着我们所获得的是非常老的东西,而不是最近才添加到土壤中去的。

17. Wait. So if horses have been there recently, there’d still be lots of nitrogen in the soil.(TPO31-L4)

等等。所以如果最近那里有很多马匹的话,那里的土壤中会有大量的氮。

18. For example, how much nitrogen or magnesium there’s in the soil in one spot.(TPO29-L1)

比如,在一个地方的土壤中,有多少氮和镁。

19. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. (TPO22-P3)

主要的差别是相比太阳,阿伦德陨星失去了大部分的挥发性元素,例如氢、碳、氧、氮以及惰性气体。

20. When photons and light waves hit objects in our atmosphere, water droplets, oxygen and nitrogen molecules, dust particles and so on, (TPO19-L2)

当光子和光波击打在我们大气层的水滴、氧气和氮气分子上时,它们就被点亮了。

21. 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. (TPO16-P2)

一个世纪以前,亨利•卡文迪许就注意到,当氧气和氮气从空气中被移除后仍然有残余气体存在,但当时没人意识到其中的重要性。

22. The three most important nutrient cycles are the nitrogen cycle, the carbon cycle and the one we are going to talk about today, the Phosphorus cycle. (TPO10-L3)

最重要的三种营养回收包括氮循环、碳循环以及今天我们要讲的磷循环。

23. What about, well, you said that the nitrogen cycle is also an important nutrient cycle. (TPO10-L3)

那么,您刚才说氮循环也是很重要的养分循环,

24. And there is a lot of nitrogen in the atmosphere, so I was wondering, is there a lot of Phosphorus in the atmosphere, too? (TPO10-L3)

而大气层中有很多的氮,所以我在想,大气层中也有很多的磷吗?

25. However, there’s just not a substantial amount of it there, like there is with nitrogen. (TPO10-L3)

90/5000 然而,那里的数量并不大,就像氮气一样。

26. These microbes enable the soil to have more nitrogen, which plants need to live and they remain quite active during the winter. (TPO9-L2)

这些微生物可以让土壤中的氮含量增加。氮是植物生长所需,而冬天的时候微生物会保持活跃状态。

27. Even nitrogen, which is a gas in its elemental state, is normally absorbed from the soil as nitrate ions. (TPO5-P1)

即使是元素状态为气体的氮,也通常作为硝酸根离子从土壤中被吸收。

28. Soils are most commonly deficient in nitrogen and phosphorus. (TPO5-P1)

土壤最常缺乏的是氮和磷。