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- What is the percentage of nitrogen in air? 空气中所含的氮的比例是多少?
- The plants keep the nitrogen in their roots,legum . 植物将氮气保存在他们的根部。
- The principal metal in an alloy, as the iron in steel. 合金中的主要金属,例如钢中的铁
- The casings are ail in steel or stainless steel. 外壳可以是钢质的,也可以是不锈钢的。
- To overtake Britain in steel production. 钢铁生产超过英国。
- If it were not for oxygen and nitrogen in the air, no man could live on the earth. 大气中如果没有氧和氮,人就无法生存于地球了。
- Kinetics Influence of Oxygen Releasing from Furnace Lining on Removal of Nitrogen in Steel during Vacuum Smelting 炉衬产生的氧对真空钢液脱氮的动力学影响
- Urea is commonly used as the source of nitrogen in foliage sprays. 尿素作为氮素给源普遍地应用于叶面喷布。
- Is it the only alloy element in steel? 它是钢中唯一的合金元素吗?
- This is obvious in steel car bodies. 钢制的汽车车体便是显而易见的例子。
- His father is a big shot in steel industry. 他父亲是钢铁大王。
- The plant requires nitrogen in order to make proteins. 植物需要用氮来制造蛋白质。
- Be it the only alloy element in steel? 它是钢中唯一的合金元素吗?
- China detains chief suspect in steel exec's death. 涉嫌殴打通话钢厂总经理致死的嫌犯在长春被捕。
- In steel production,we have laged far behind many provinces. 在钢的生产方面,我们已经远远地落在许多省的后面。
- Enrichment of organic matter and nitrogen in eroded bedloads. 侵蚀泥沙、有机质和全氮富集规律研究。
- The fact stood out cut in steel on the pitiless daylight. 在无情的光天化日下,这个事实是确凿无疑的。
- This music would sound more ethnic if you played it in steel drums. 如果你用钢鼓演奏, 这首乐曲将更具民族特色。
- In steel production, we have laged far behind many provinces. 在钢的生产方面,我们已经远远地落在许多省的后面。
- This may occur in response to a high level of reduced nitrogen in the medium. 这可能是由于对培养基中高水平的还原氮的反应而发生的。