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- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- The lamp is full of gaseous nitrogen. 灯里充满了气体氮。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- Ammonium is toxic and is converted to organic nitrogen compounds in the root. 铵有毒，在植物根部被转化为有机含氮化合物。
- A highly explosive mixture of ammonium nitrate and trinitrotoluene. 阿马托炸药一种由硝酸铵和三硝基甲苯组成的烈性混合炸药
- It is compatible with ammonium compounds. 它可与氨化合物混用。
- Manufacturing sales : Yean, ammonium bicarbonate. 制造销售：液氨、碳酸氢铵。
- Impregnation with ammonia or an ammonium compound. 氨化作用用氨或氨化物浸渗
- Will you sunder nitrogen from air? 你能从空气中把氮气分离出来吗?
- Ammonium Fatty Alcohol Polyoyetylene Ether Sulfate? 醇醚硫酸?
- Nitrogen is the most commonly used gas. 氮气是最常用的气体。
- The trick was using the ammonium salt TMAH. 它的窍门是使用铵盐氢氧化四甲铵（TMAH）。
- Sample gas tubes are flushed with nitrogen. 采气管得用氮气吹扫。
- The main reservoir of nitrogen is the atmosphere. 氮的主要蓄存库是大气层。
- What is the percentage of nitrogen in air? 空气中所含的氮的比例是多少?
- Fast neutrons are also captured by nitrogen. 快中子也可以被氮吸收。
- These mines supply the raw material for making ammonium sulphate. 这些矿提供了制造了硫酸氨的原抖。
- Nitrogen forms four-fifths of the atmosphere. 氮气占空气的五分之四。
- Nitrogen forms about four-fifths of the atmosphere. 氮约佔大气的五分之四。
