nitrogen
简明释义
n. [化学] 氮
英英释义
单词用法
氨氮；氨型氮，氨基氮 | |
含氮量；总氮量 |
同义词
| 氮气 | Nitrogen is a major component of the Earth's atmosphere, making up about 78% of it. | 氮是地球大气的主要成分，约占78%。 |
反义词
| 氧气 | 氧气对人类呼吸至关重要。 | ||
| 氦气 | Helium is often used in balloons because it is lighter than air. | 氦气常用于气球，因为它比空气轻。 |
例句
1.Carnivorous plants instead draw nitrogen, phosphorus, and other critical nutrients from their prey in order to build light-harvesting enzymes.
相反，食肉植物从它们的猎物那里吸收氮、磷和其他重要的营养物质，以制造聚光酶。
2.Above all, they will have to discover how much nitrogen it possesses.
最重要的是，他们必须搞清楚这里面含有多少氮。
3.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。
4.Since nitrogen is four fifths of the air we breathe, they are surprisingly optimistic about raising the temperature on Mars and believe it could be done in hundred years.
由于氮占我们呼吸的空气的五分之四，他们对提高火星的温度持惊人的乐观态度，相信这可以在一百年内完成。
5.The conditions for acquiring and retaining a thick nitrogen atmosphere are now readily understood.
现在很容易了解获得和保持厚氮大气的条件。
6.We look at soil chemistry—for example, how much nitrogen or magnesium there is in the soil in one spot—and we compare it with the chemistry of the soil a short distance away.
我们会观察土壤的化学性质——比如某个地方的土壤里有多少氮或者镁——然后与附近土壤的化学性质作比较。
7.The faeces contain nitrogen which fertilizes the soil.
排泄物含有肥沃土壤的氮。
8.Plants need nitrogen to grow healthy and strong.
植物需要氮气才能健康茁壮地生长。
9.Liquid nitrogen is commonly used for cryopreservation.
液态氮气常用于冷冻保存。
10.Fertilizers often contain nitrogen to enhance soil fertility.
肥料通常含有氮气以增强土壤肥力。
11.In the lab, we use nitrogen gas to create an inert atmosphere.
在实验室中，我们使用氮气来创造惰性气氛。
12.The atmosphere is composed of about 78% nitrogen.
大气中约有78%的氮气。
作文
Nitrogen is one of the most abundant elements in the universe, making up about 78% of the Earth's atmosphere. It is a colorless, odorless gas that is essential for life. In the context of biology and ecology, nitrogen (氮) plays a crucial role in various processes. For instance, it is a key component of amino acids, which are the building blocks of proteins. Without nitrogen (氮), organisms would not be able to produce these vital proteins, leading to a breakdown in cellular functions and overall health. In agriculture, nitrogen (氮) is often used as a fertilizer to enhance plant growth. Plants require nitrogen (氮) for photosynthesis and to synthesize chlorophyll, which is necessary for converting sunlight into energy. When farmers apply nitrogen (氮) fertilizers to their fields, they are essentially providing plants with the nutrients they need to thrive. However, excessive use of nitrogen (氮) fertilizers can lead to environmental issues, such as water pollution and the disruption of local ecosystems. This is because runoff from agricultural lands can carry excess nitrogen (氮) into rivers and lakes, causing algal blooms that deplete oxygen levels and harm aquatic life.Moreover, nitrogen (氮) is also a critical element in the formation of DNA and RNA, the molecules that carry genetic information. The presence of nitrogen (氮) in these molecules underscores its importance in the reproduction and functioning of all living organisms. Additionally, many microorganisms in the soil have the ability to fix atmospheric nitrogen (氮), converting it into forms that plants can absorb. This natural process is vital for maintaining the nitrogen (氮) cycle, which ensures that this essential element is available in a usable form for all life forms.The nitrogen (氮) cycle consists of several steps: nitrogen fixation, nitrification, assimilation, ammonification, and denitrification. Each of these processes contributes to the recycling of nitrogen (氮) in the ecosystem. For example, during nitrogen fixation, certain bacteria convert atmospheric nitrogen (氮) into ammonia, which can then be used by plants. Nitrification involves the conversion of ammonia into nitrites and then nitrates, which are also usable by plants. On the other hand, denitrification is the process through which nitrogen (氮) is returned to the atmosphere, completing the cycle.In conclusion, nitrogen (氮) is an indispensable element that supports life on Earth. Its role in biological systems, agriculture, and environmental processes cannot be overstated. As we continue to learn more about the significance of nitrogen (氮), it becomes increasingly clear that managing its use wisely is essential for sustaining our planet's health and the well-being of future generations. Whether through responsible farming practices or understanding its biological importance, recognizing the value of nitrogen (氮) is crucial for both ecological balance and human advancement.
氮是宇宙中最丰富的元素之一，占地球大气的约78%。它是一种无色、无味的气体，对生命至关重要。在生物学和生态学的背景下，nitrogen（氮）在各种过程中发挥着关键作用。例如，它是氨基酸的关键成分，而氨基酸是蛋白质的基本构件。没有nitrogen（氮），生物体将无法产生这些重要的蛋白质，从而导致细胞功能和整体健康的崩溃。在农业中，nitrogen（氮）常被用作肥料，以促进植物生长。植物需要nitrogen（氮）进行光合作用，并合成叶绿素，这对于将阳光转化为能量是必要的。当农民向田地施用nitrogen（氮）肥料时，他们实际上是在为植物提供它们生存所需的营养。然而，过量使用nitrogen（氮）肥料可能导致环境问题，例如水污染和当地生态系统的破坏。这是因为农业用地的径流可以将多余的nitrogen（氮）带入河流和湖泊，导致藻类爆发，从而耗尽氧气水平，危害水生生物。此外，nitrogen（氮）在DNA和RNA的形成中也是一个关键元素，这些分子携带遗传信息。这些分子中存在的nitrogen（氮）强调了其在所有生物体繁殖和功能中的重要性。此外，土壤中的许多微生物能够固定大气中的nitrogen（氮），将其转化为植物可以吸收的形式。这个自然过程对于维持nitrogen（氮）循环至关重要，确保这一重要元素以可用的形式供所有生命形式使用。nitrogen（氮）循环包括几个步骤：氮固定、硝化、同化、氨化和反硝化。这些过程中的每一个都对生态系统中nitrogen（氮）的回收做出了贡献。例如，在氮固定过程中，某些细菌将大气中的nitrogen（氮）转化为氨，植物可以利用这些氨。硝化涉及将氨转化为亚硝酸盐，然后转化为硝酸盐，这些也是植物可以使用的。另一方面，反硝化是将nitrogen（氮）返回到大气中的过程，完成了循环。总之，nitrogen（氮）是支持地球上生命不可或缺的元素。它在生物系统、农业和环境过程中的作用不可低估。随着我们对nitrogen（氮）重要性的了解不断加深，越来越清楚的是，明智地管理其使用对维持我们星球的健康和未来几代人的福祉至关重要。无论是通过负责任的农业实践，还是理解其生物学重要性，认识nitrogen（氮）的价值对于生态平衡和人类进步都至关重要。
