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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。
- nitrogen speciation 氮形态
- 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。
- Subspecies is a stage during process of speciation. 亚种是物种形成过程中的一个阶段。
- The Mariana Mallard arose from hybrid speciation. 马里亚纳野鸭就是杂交物种形成产生的。
- Will you sunder nitrogen from air? 你能从空气中把氮气分离出来吗?
- 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。
- Nitrogen forms four-fifths of the atmosphere. 氮气占空气的五分之四。
- In some fungi, there is evidence of incipient speciation. 在某些真菌中，有新发生的物种形成的证据。
- The main exceptions to this are hybrid and polyploid speciation. 对于这一点，最主要的例外是杂种和多倍体物种。
- Nitrogen forms about four-fifths of the atmosphere. 氮约佔大气的五分之四。
- There are two kinds of hybrid speciation: homoploid and polyploid. 杂合体物种形成有两种：同倍体和多倍体。
- What is the content of the crude nitrogen. 污氮的含氧量是多少?
- In plants, polyploidy must be included in any view of speciation. 在植物中，任何物种形成观念都必须考虑多倍性。
