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- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- Purification of nitrogen and phosphorus 氮磷净化
- water requirements for self purification of the stream 自净需水量
- Purification of water may be achieved by distillation. 水的净化可由蒸馏获得。
- Do not attempt purification of NF3 via adsorption. 禁止试图通过吸附来净化NF3。
- 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?
- Purification of Nitrile Hydratase from Nocardia sp. 腈水合酶的纯化过程研究。
- Purification of thought-form requires fire. 思想的净化需要火元素。
- The crux of the matter was a lack of nitrogen. 问题的关键在于缺少氮。
- The purification of natural cecropin D were done. 5.;本试验对天然抗菌肽D的分离纯化作了研究。
- self purification of water 水体自净
- self purification of seawater 海水自净
- Among the blue-green algae are many species of nitrogen fixation. 许多种蓝藻有固氮的能力。
- 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。
- Has an atmosphere, which is mainly made up of nitrogen. 它拥有主要由氮组成的大气。
- The pouring of sewage water in great quantity and the pollutants contained in the water of Changjiang has affected the self purification in costal water. 通过对上海滨岸带水体的深入调查、样品采集、分析测试和对比研究,对上海滨岸带水体的自净作用进行了总体评价。
- Application and Purification of the Antivirus of Penicillin sp. 一类新型抑病毒菌素的分离纯化与应用。
- The amount of nitrogen needed will increase as yield increases. 随着产量增加，需氮量也要增加。
- The host machine has modular and the structure of screw and barrel are designed with precision by com-puter,It has perfect self purification and interchangeability. 主机采用积木式原理设计，其螺杆构型，筒体结构，采用计算机精确设计，具有优异自洁性和任意互换性。
