| 释义 |
氮dàn气体元素,符号N(nitrogenium)。无色,无臭,不能燃烧,也不能助燃,化学性质很不活泼。氮在空气中约占4/5,是植物营养的重要成分之一。用来制造氨、硝酸和氮肥,也用来填充灯泡。{nitrogen(N); gaseous element, colourless and odourless, non-combustible, non-combustion-supporting, chemically inert, comprising four fifths of the atmosphere, forming an important vegetable nutrient, used to manufacture ammonia, nitric acid and fertilizers, and to fill an electric bulb;}通称{generally called}氮气{dànqì}。 |