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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。
- "Alkaloid: Basic (see base) organic compounds of plant origin, containing combined nitrogen." 生物碱:植物及少数动物体内的具有生理活性的碱性有机化合物，其分子主要由碳、氢及氮原子构成。
- The two parties have combined to form a government. 两党已经联合起来组成政府。
- The lamp is full of gaseous nitrogen. 灯里充满了气体氮。
- The combined fleet is armed to the teeth. 这支联合舰队全副武装。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- In sum, theory must be combined with practice. 总之，理论必须同实践相结合。
- Once nitrogen is combined, it is not chemically inert any longer. 氮气一经化合，在化学上就不再是惰性气体了。
- How these elements are combined is clearly known to us. 这些元素是怎样结合的我们知道得很清楚。
- Once nitrogen is combined,it is not chemically inert any longer. 氮气一经化合，在化学上就不再是惰性气体了。
- Combined into one united body; merged. 合并的，结合的并入一个整体的; 合并的
- Circumstances have combined to ruin our plans for a holiday. 各种情况凑在一起破坏了我们的假日计划。
- Will you sunder nitrogen from air? 你能从空气中把氮气分离出来吗?
- Patience combined with diligence is necessary to success. 耐心结合勤奋是成功所必需的。
- Nitrogen is the most commonly used gas. 氮气是最常用的气体。
- 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。
