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- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- guano nitrogen 氮素海鸟粪
- 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。
- The cave floor is covered in guano. 洞穴地底覆盖了满满的鸟粪。
- A tiny ball of bat guano and sulfur. 材料成分：一个蝙蝠粪和硫磺小球。
- Will you sunder nitrogen from air? 你能从空气中把氮气分离出来吗?
- Uh guano company will set up a sale subsidiary in singapore. 华光公司将在新加坡建立一个子公司。
- 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。
- Like most treasure, guano demanded a high price for its extraction. 一如大部分珍贵资源，开采鸟粪层代价很高。
- 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。
- The canyon walls are lined with giant harpy nests and guano. 峡谷壁上到处是巨大的鸟身人巢穴和鸟粪。
- Today the guano is long gone, but the pile of money remains. 今年，海鸟粪已经消失了，但资金却留了下来。
- Nitrogen forms about four-fifths of the atmosphere. 氮约佔大气的五分之四。
- What is the content of the crude nitrogen. 污氮的含氧量是多少?
