蒸发的

we use magnetron sputtering to deposit Al-AlN particle film as SED's electron-emitter. The Cr-Cu-Cr electrode was prepared by electron beam vaporize deposition. The voltage used to electroform the cracks are periodic trigonal wave and the breadth of the voltage are increasing gradually.

文章中采用铝-氮化铝薄膜材料作为SED器件的电子发射层，采用磁控溅射的方法镀电子发射层，采用电子束蒸发的方法镀铬-铜-铬材料作为电极；电形成过程中采用电压幅值恒定、周期性重复的脉冲和电压幅值渐增的电压脉冲作为电极电压。

Because the limited time period of this study, to investigate the long term effects of row space and crop density on reducing soil evaporation are necessary in the future.

由于这次研究的期间较短，对行距、多播等项目的研究尚不够深入，有必要在今后的工作中进一步探讨。同时，对哪种秸秆可以避免降低冬小麦地温的问题进行深入研究，具有重要的现实意义，如果能解决好这个问题，则不仅有利于秸秆覆盖的大面积推广，而且能达到在使作物增产的同时减少土壤蒸发的目的。

The physico-mathematical model was established by considering the variation of the apparent contact angle to describe the configuration of the total extended thin film region,including the equilibrium region,the interline region and the meniscus region.In addition,the ratio of disjoining pressure and capillary pressure was introduced to distinguish the film ranges of the different regions by considering the influence of film configuration,liquid property and channel size.

借助表观接触角的演化，建立起包含固有弯月面、过渡薄液膜和平衡区三部分的延展薄液膜形状及其表面蒸发的物理数学模型，并考虑液膜的结构、工质物性和通道特征尺度，引入分离压力和毛细压力比确定液膜不同区域的范围。

On the basis of experiment analyses we would got that, When arc met with chute, it was blocked and had a stagnation, this made hot gas flow incrase near the chute; After arc went into the chute, mental vapor from arc root would lower the dielectric strength near the chute, meanwhile, High value of arc voltage and the corase face of the chute made electric strength increase. These factors might give rise to local restriking near the chute, and made arc voltage drop suddenly.

总结实验结果并加以分析，本文提出了这样的观点：电弧进入栅片时，在入口处受阻后的停滞，会使该区域的热气流增加；进入栅片后，弧根蒸发的金属蒸汽、电弧热气流会降低栅片入口区域的介质强度；电弧被栅片分割后，电压急剧上升，再加上栅片表面的不均匀会使局部区域的电场强度显著增加，这些因素的综合作用会导致电弧在栅片入口附近发生局部重击穿，引起电弧电压电压跌落。

To control the ground-water table on irrigated lands is vitally important in arid and semi-arid regions. In order to determine the standard of water table control, considerable attentions were paid to the "critical depth"(or "safe depth") of ground-water table. The salts accumulate in the top soil if the water table is not deeper than this depth. The conditions that the salts accumulate in any layer of the soil owing to the movement of soil moisture are:(1) the supplement of soil moisture from neighboring...

本文分析了地下水补給情况下土壤水分的形态和不同形态的水分在土壤中运行和蒸发的一些特点，论証了毛管水联系破裂含水率等土壤水分形态指标与土壤水分运动和土壤积盐状况的关系，探討了次生盐碱化发生的地下水临界条件，提出了地下水临界深度的确定方法，并且对現有的临界深度的确定方法进行了討论与比較。

The systematic experiment of conservation tillage in two crops a year region has been designed and performed according to the maximum benefit of resources, environment and production, based on the research achievements of conservation tillage technology in one crop a year regions. Series experiments and embedded theory study have been conducted for estimating the feasibility of water saving in conservation tillage and guiding irrigation. At the same time, the evaporations of soil water under the condition of conservation tillages are measured and its mathematic model is studied and significant research achievements have been obtained.

中文文摘：为研究一年两熟地区实行全程保护性耕作技术体系的可行性，选择出适宜该地区一年两熟的保护性耕作技术体系和提供指导灌溉用水的理论依据，论文在一年一熟地区保护性耕作体系研究成果的基础上，以一年两熟地区全程保护性耕作体系的资源环境效益和生产效益为依据，进行了深入的理论分析和田间试验研究；同时进行了保护性耕作条件下，土壤水分棵间蒸发的专项试验及模型研究，取得了重要的研究进展。

The systematic experiment of conservation tillage in two crops a year region has been designed and performed according to the maximum benefit of resources, environment and production, based on the research achievements of conservation tillage technology in one crop a year regions. Series experiments and embedded theory study have been conducted for estimating the feasibility of water saving in conservation tillage and guiding irrigation. At the same time, the evaporations of soil water under the condition of conservation tillages are measured and its mathematic model is studied and significant research achievements have been obtained.

为研究一年两熟地区实行全程保护性耕作技术体系的可行性，选择出适宜该地区一年两熟的保护性耕作技术体系和提供指导灌溉用水的理论依据，论文在一年一熟地区保护性耕作体系研究成果的基础上，以一年两熟地区全程保护性耕作体系的资源环境效益和生产效益为依据，进行了深入的理论分析和田间试验研究；同时进行了保护性耕作条件下，土壤水分棵间蒸发的专项试验及模型研究，取得了重要的研究进展。

Generally, the multiple - effect vacuum evaporating process is adopted and heat - exchanging equipments are mainly shell and tube exchangers, and stage I always adopts 0.6 MPa new steam as heat source.

在氧化铝的生产过程中，需要保持系统的水平衡和盐平衡，一般采用多效真空蒸发的生产工艺，换热设备大都采用列管式换热器，I效多采用0.6MPa的新蒸汽作为热源。

In a sign that the Olympics feelgood factor has already begun to evaporate, protesters took to the streets of Beijing yesterday in an escalating campaign against the city's biggest dump site, which they claimed was polluting the air with a foul stench and dangerous dioxins.

奥运会所带来的积极因素已有开始蒸发的迹象，昨天抗议者走上北京街头，强烈抗议北京市最大的垃圾场。他们称该垃圾场臭气熏天，含有危险的二恶英，污染环境。

For those tens of thousands of Iranians, in Tehran and other cities such as Mashhad and Isfahan, who are still willing to risk a truncheon charge or tear gas, not to mention the possibility of arrest and disappearance, the guardianship of the jurist (known in Persian as velayat-e faqih) has outlived its usefulness.

在德黑兰和其他城市，例如马什哈德和伊斯法罕，至今仍有数万伊朗人甘愿冒被警棍或催泪瓦斯攻击的危险，被捕和人间蒸发的可能性自不待言。对他们而言，护卫宪法本身的意义远大于它的实际作用。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。