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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。
- Nitrate of soda may be sown on pasture that does not eat off. 可以把硝酸钠撒在牧草还没有吃光的草地上。
- Some commercial laboratories use periodic nitrate nitrogen tests as guides. 许多商业性的试验室已应用定期的硝态氮分析作为指导。
- Appling only nitrogen manure was sure to cause accumulation of nitrate easily. 单施氮肥容易导致硝酸盐的大量积累。
- 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
- A cellulose nitrate used as a component of smokeless powder. 火纤维素硝酸纤维素，用于无烟的炸药的组成物质
- Nitrate reductase is a short-lived enzyme. 硝酸还原酶是短寿酶。
- They were able to nitrate methane to nitromethane. 他们能将甲烷硝化成硝基甲烷。
- Will you sunder nitrogen from air? 你能从空气中把氮气分离出来吗?
- Nitrate is added to most cured meats. 大多数的腌肉里都加了硝酸盐。
- Nitrogen is the most commonly used gas. 氮气是最常用的气体。
- We need to cut nitrate levels in water. 我们需要降低水中的硝酸盐含量。
- 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。
- Nitrate was aerobically reduced to nitrite. 硝酸盐去氧后转化为亚硝酸盐。
- What is the percentage of nitrogen in air? 空气中所含的氮的比例是多少?
- This nitrate opalesces under certain conditions. 这种硝酸盐在特定条件下会发出乳白色光。
