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- Air consists chiefly of nitrogen. 空氣主要由氮氣組成。
- Nitrogen forms most of the Earth's air. 地球上空氣的大部分成分是氮氣。
- The lamp is full of gaseous nitrogen. 燈里充滿(mǎn)了氣體氮。
- Nitrogen forms about 78% of the earth's atmosphere. 氮約占地球大氣的百分之七十八。
- Chaling County Nitrogenous Fertilizers P. 茶陵縣氮肥廠(chǎng)。
- Anhua County Nitrogenous Fertilizer Fact. 安化縣氮肥廠(chǎng)。
- Anren County Nitrogenous Fertilizers Pla. 安仁縣氮肥廠(chǎng)。
- Anxiang County Nitrogenous Fertilizers F. 安鄉縣氮肥廠(chǎng)。
- Will you sunder nitrogen from air? 你能從空氣中把氮氣分離出來(lái)嗎?
- Porphyrin chemistry is one important branch in chemical field. 卟啉化學(xué)是現代化學(xué)領(lǐng)域中重要的研究分支之一。
- Nitrogen is the most commonly used gas. 氮氣是最常用的氣體。
- Sample gas tubes are flushed with nitrogen. 采氣管得用氮氣吹掃。
- The main reservoir of nitrogen is the atmosphere. 氮的主要蓄存庫是大氣層。
- What is the percentage of nitrogen in air? 空氣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. 氮氣占空氣的五分之四。
- Nitrogen forms about four-fifths of the atmosphere. 氮約佔大氣的五分之四。
- What is the content of the crude nitrogen. 污氮的含氧量是多少?
- Is a nitrogen atmosphere needed for hand soldering? 手工焊接需要使用氮氣嗎?
- Nitrogen Atmosphere in Bearing Steel Ball H, T. 氮基保護氣氛中軸承鋼球的熱處理
