Nitrogen
['naɪtrədʒ(ə)n] or ['naɪtrədʒən]
解释:
(noun.) a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues.
埃莉整理--From WordNet
解释:
(n.) A colorless nonmetallic element, tasteless and odorless, comprising four fifths of the atmosphere by volume. It is chemically very inert in the free state, and as such is incapable of supporting life (hence the name azote still used by French chemists); but it forms many important compounds, as ammonia, nitric acid, the cyanides, etc, and is a constituent of all organized living tissues, animal or vegetable. Symbol N. Atomic weight 14. It was formerly regarded as a permanent noncondensible gas, but was liquefied in 1877 by Cailletet of Paris, and Pictet of Geneva.
录入:奥利维尔
同义词及近义词：
n. Azote.
霍奇编辑
解释:
n. a gas forming nearly four-fifths of common air a necessary constituent of every organised body so called from its being an essential constituent of nitre.—adjs. Nitrogen′ic Nitrog′enous.—v.t. Nitrog′enise to impregnate with nitrogen.—n. Nitrom′eter an apparatus for estimating nitrogen in some of its combinations.
手打:罗谢尔
例句:
- The pure nitrogen then can be pumped into the fixation ovens. 佚名. 神奇的知识之书.
- Inasmuch as the nitrogen of liquid air evaporates first, and leaves nearly pure liquid oxygen, it may also be employed as a means for producing and applying oxygen. Edward W. Byrn. 十九世纪发明进展.
- Commercial fertilizers generally contain nitrogen, phosphorus, and potash in amounts varying with the requirements of the soil. 伯莎M.克拉克. 科学通论.
- The gas first evaporating is nitrogen, and a lighted match applied to the surface of the liquid is quickly extinguished, since nitrogen does not support combustion. Edward W. Byrn. 十九世纪发明进展.
- The most important of plant foods is nitrogen. 佚名. 神奇的知识之书.
- Nitrogen is colorless, odorless, and tasteless. 伯莎M.克拉克. 科学通论.
- The fact that the oxygen of the air is diluted as it were with so large a proportion of nitrogen, prevents fires from sweeping over the world and destroying everything in their path. 伯莎M.克拉克. 科学通论.
- While the earth is literally bathed in nitrogen, this element is found to only a very slight degree in the soil. 佚名. 神奇的知识之书.
- The free nitrogen of the air cannot be utilized directly by plants. 佚名. 神奇的知识之书.
- When the temperature is about as hot as that of molten iron the pure nitrogen gas from the liquid air plant is pumped in and allowed to act on the calcium carbide for about a day and a half. 佚名. 神奇的知识之书.
- The presence of these nitrogen compounds influences the action of the chlorine and produces unsatisfactory results. 伯莎M.克拉克. 科学通论.
- He drew diagrams combining an a tom of oxygen with an atom of nitrogen and an atom of aqueous vapor. 李贝. 西洋科学史.
- He also by use of the electric spark caused the oxygen and nitrogen of the air to unite to form nitric acid. 李贝. 西洋科学史.
- When nitrogen gas is in contact with heated calcium carbide, a reaction takes place which results in the formation of calcium nitride, a compound suitable for enriching the soil. 伯莎M.克拉克. 科学通论.
- Air has usually been held to consist of four volumes of nitrogen and one volume of oxygen, with a very small proportion of carbonic acid gas and ammonia. Edward W. Byrn. 十九世纪发明进展.
费利西亚编辑