挥发的

Therefore, doing research of the nutrient balance in the loessplateau has its practical signification. Using the long-term rotation and fertilization experiment that disposed in dry land on theloess plateau, the paper has studied nutrients in rainfall import to farmland ecosystem andAmmonia volatilization losses and nutrients disbursal of crop, also estimated the balance ofnutrients in farmland soil.

本文利用设在黄土高原旱地上的长期轮作与施肥试验，主要研究了黄土高原农田生态系统养分的降水带入、作物地上部分的氨挥发损失和作物的养分支出，并进行了 N、P、K 养分平衡评价。

Compared with coal,biomass volatilization and combustion time is short, so boiler combustion efficiency can be guaranteed. Chemistry dynamics calculation is made on biomass volatilization deoxidizing NO.

本文还尝试了通过生物质挥发分同相还原NO的化学动力学计算来对生物质燃料的再燃进行模拟，计算结果和试验结果规律是一致的，说明该模型是合理的。

But the gas was charged early, the phenomenon that some gases were enwrapped in the specimen occurred and the densification was blocked.

由于气氛的存在抑制了液相的挥发，但过早引入气体，在气氛烧结中会产生部分气体被包裹的现象，阻碍了样品的致密化过程。

The analytical characteristic and the regulation for the direct analysis of advanced ceramic in slurry sampling/fluorinating assisted electrothermal vaporization-ICP-AES were studied in detail; The possibilities of simultaneous determination for elements with different volatility were inspected also, a high sensitive and effective method for the direct analysis of ceramic powder has been described.

详细研究了悬浮体制样/氟化电热蒸发-ICP-AES直接分析先进陶瓷材料的分析性能及其规律性，考察了同时测定陶瓷材料中不同挥发性的痕量元素的可能性，提出了一条高灵敏、高效率的陶瓷材料直接分析新途径。

For the first time, a new method to blow out and separate volatile pollutants from aqueous solution by ultrasound is presented, which inaugurates a brand-new application field for ultrasonic technique at the same time.

基于空化效应，进行了有机污染物超声降解动力学及其机理的研究；首次提出了利用超声波吹脱分离水中挥发性污染物的新方法，为超声波开辟了一个新的应用领域；率先开展了利用超声波清洗膜污染和减轻浓差极化的中试研究。

The removal efficiency of VOCs by the air sparging process depends critically on the contact volume of the contaminated groundwater by the injected air, or the sweep efficiency.

气提法是藉著注入地下水层中的空气将溶於地下水及非饱和层中的挥发性有机污染物带出，因此空气在含水层之流动路径及接触污染物的排扫效率就成了影响气提法现场污染整治成效的重要因素。

A possibility of certain speciation of iodine vaporizing and accumulating at the low altitude atmosphere from the soils is proposed.

笔者提出，土壤中某种形态的碘可能以气态挥发并在近地大气层富集，存在植物吸收利用这一部分碘的条件的地区，不会有碘缺乏病的流行。

Its emission accounts for half of the hydrocarbons total one, and especially is very high in the rural and well vegetated areas, which greatly influences the regional environment such as ozone concentration.

异戊二烯(C_5H_8)是对流层中重要的NMHC，也是植被释放最多的挥发性有机化合物，其排放量占植物烃类总排放量的一半，特别是在农村和边远地区大气边界层中含量很高，往往对局地大气环境，如臭氧浓度有很大的影响。

However, it is unavoidable the spillage and leakage of crude oil and oil products occur in the processes of oil exploitation, refinement, transportation and application. First of all, a small amount of light hydrocarbons volatilizes into atmosphere while the others can stay in the unsaturated zone or reach groundwater table under the action of gravity and capillary pressure, which may directly or indirectly cause oil pollution of groundwater system.

但是，在石油的开采、炼制、运输和使用的过程中，不可避免地会有大量原油和石油制品抛洒或泄漏于地面，其中的一些轻质石油组分通过挥发进入大气，而绝大部分石油会在重力和毛细力的作用下渗入包气带，或者透过包气带达到地下水面，从而间接或直接地污染地下水。

Firstly, headspace solid-phase microextraction was established to determine AITC by orthogonal design. Extraction temperature, stir speed, extraction time, and desorption time were set at 40℃, 900r/min, 30min, and 5min, respectively. Under these optimal conditions, volatile flavor compounds in mustard oil, wasabi, and 'Chongcai'leaf mustard product were identified by SPME/GC/MS. In these three samples, 6,12,17 constituents were identified respectively; Allyl isothiocyanate was the main flavor compound, which accounted for 73.45%, 64.25%, 32.74% of total volatile compounds, respectively. Carbon disulfide, a hydrolysis product of AITC, accounted for 14.37% 25.40%, 51.67% of total volatile compounds respectively. There were some other isothiocycannates, such as butane, 1-isothiocyanato-, isobutyl isothiocyanate, 1-benzene, 4-isothiocyanato-, benzene (2-isothiocyanatoethyl)-, etc.

首先采用正交实验设计优化固相微萃取技术的前处理条件，结果表明，以萃取温度40℃、搅拌速度900r／min、萃取时间30min、解吸时间5min为最佳条件；在此最优条件基础上，利用SPME／GC／MS联用技术分析芥末油、青芥辣、冲菜的挥发性风味成分，分别检出6、12、17种化合物，主要风味物质均为AITC，相对丰度分别为73.45％、64.25％、32.74％；AITC的水解产物二硫化碳的相对丰度分别为14.37％、25.40％、51.67％；还检测到了其它几种异硫氰酸酯，如异硫氰酸丁酯、异硫氰酸异丁酯、异硫氰酸丁烯酯、2-苯乙基异硫氰酸酯等。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。