| 例句 |
How much nitrogen is there in the air?空气中含有多少氮气？The soil in this area is rich in nitrogen.这个地区的土壤含丰富的氮。Many fertilizers contain nitrogen compounds.许多化学肥料都含有氮化合物。Saturn's moon, Titan, has an atmosphere mainly made of nitrogen.土星的卫星泰坦的大气层主要由氮气构成。The faeces contain nitrogen and it is that which fertilises the desert soil.粪便含氮，而正是氮可以肥化荒芜的土地。Most fertilizers contain nitrogen and phosphates.大多数化肥都含有氮和磷酸盐。The earth's atmosphere is composed mainly of nitrogen, oxygen, and carbon dioxide.地球大气主要由氮气、氧气和二氧化碳组成。After a short time the oxygen and the nitrogen molecules will start to mix.再过片刻，氧分子和氮分子将开始结合在一起。In order to decompose, all vegetable matter needs supplies of nitrogen.所有植物性物质的分解都需要氮气的供应。Britain agreed to cut emissions of nitrogen oxide from power stations.英国同意减少发电站氧化氮的排放量。Sulphur dioxide and nitrogen oxide combine to form acid rain.二氧化硫和氮氧化物结合形成酸雨。Oxygen, hydrogen, and nitrogen are all gases.氧气、氢气和氮气都是气体。The soil was tested to make sure that it was free from ammonia or any other nitrogen compound.土壤经过了测定，以保证当中不含有氨或其他氮的化合物。Liquid nitrogen boils at a very low temperature.液态氮在很低的温度下就会达到沸点。Carbon atoms can form bonds with nitrogen and oxygen atoms.碳原子可以与氮和氧原子形成化学键。Air is composed mainly of nitrogen and oxygen.空气主要由氮和氧构成。What is the percentage of nitrogen in air?空气中氮占百分之几? The decomposition of the solution yields nitrogen.此溶液分解后产生氮。The samples were frozen in liquid nitrogen.这些样品冷冻在液态氮里。The faeces contain nitrogen and it is that which fertilizes the desert soil.粪便含氮，而正是氮使荒芜的土地变得肥沃。These vegetables are high in nitrogen.这些蔬菜含氮量高。 |