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Now people attach importance to the cleaning of silicon grinded wafer. There are a lot of carborundums and silicon powders on the wafer surface because grinded wafer are grinded by carborundum and corresponding depth are remove in the sequence of grinding. After grinding there are plenty of carborundums and silicon powders enchase in the damaged layers. So there are many difficulties in later processes.

半导体硅单晶衬底加工工业中最受重视是硅磨片的清洗，由于硅磨片是用金刚砂研磨的，研磨过程中又要去除相应的厚度，所以刚加工的磨片表面附着着大量的金刚砂和研磨下来的硅粉，而且还有相当一部分金刚砂和硅粉镶嵌到破损层里面，这给后续的清洗工作带来了困难。

NKCCl(superscript -/-) mice were deaf and demonstrated difficulties in maintaining their balance. NKCC1 mice exhibited a marked atrophy of the stria vascularis, contraction of the endolymphatic compartments and collapse. CONCLUSION: NKCCl channel plays a critical role in potassium homeostasis of endolymph in the inner car.

光镜下NKCCl野生型小鼠和NKCCl杂合子小鼠的耳蜗解剖结构无明显异常；NKCCl突变纯合子小鼠的耳蜗出现前庭膜塌陷、内淋巴腔缩小而致中阶完全消失，并有血管纹萎缩、Corti器缺失、螺旋神经节萎缩；且球囊和椭圆囊膜迷路失去正常结构并出现塌陷等病理改变。

Although the parliament passes some acts about the activities of the domestic industry and commerce and the abroad trade, Edward has to take the Italians as his business agents of imports and exports, and the English businessmen are faced with a lot of difficulties because the businessmen of Italy and the Hanse enjoy some political and economical privileges in England, which consequently harms the political and economical interests of the English themselves. In the later period of the 15th century some of the movements of exclusionism take place in London, Southampton, Bristol, etc.

虽然爱德华统治时期英国颁布了一些推动国内工商业和海外贸易活动发展的法案，他不得不依赖意大利商人从事进出口贸易业务，在英国享有特权的汉萨同盟商人依然损害着英国人的政治经济利益。15世纪后期，伦敦、布里斯托尔、南安普顿爆发的排外运动，反映了英格兰民族意识的觉醒和民族精神的高涨。

In recent years,the subtle oil and gas reservoirs in Heidimiao Formation of Daqing have been studied,and great breakthrough has been obtained theoretically.But there are still some difficulties in identifying clearly the river channel sand-body,fan delta,sheet sand and so on at various depths.

摘要几年来，大庆地区黑帝庙油层隐蔽油气藏的研究在理论上取得了重要突破，但在地震上如何清晰识别不同埋深的河道砂体、扇三角洲、席状砂等特殊异常体还存在一定困难。

At present, most load systems in China are fluid drive systems; this paper solves two main difficulties in electro-motion system: the realization of speediness and the elimination of the superabundant torque. It can provide some new information in load systems further investigation.

国内现有的加载系统多为液压加载，本文的研究工作解决了电动加载的两个主要难点：快速性的实现和多余力的消除，对加载系统的研究有一定的参考价值。

Those happy with their ability to take vacations was down to 18.3 percent in 2005 from 22.4 percent in 1990, a sign of the difficulties workers have in taking their full holiday entitlement as they face heavy workloads and pressure from bosses.

对休假情况满意者的比例从1990年的22.4％降至2005年的18.3％。

Approximate IQ range of 50 to 69 (in adults, mental .IgC from 9 to under 12 years). Likely to result in some learning difficulties in school.

智力测验智商范围大约在 50 至 69 之间（成人的心智年龄自 9 岁至 12 岁以下）似乎会导致一些在学校的学习困难。

But admitted, the current development of military enterprises, there were still many questions: First, more than 50 listed companies inside and outside the military industry is very broad distribution, and the majority of smaller scale, it is difficult to take on Group using capital firms grow in size and strength of the main objectives; Second, a military enterprises in relation to a specific situation, holding a number of enterprises listed companies, and some even reached more than 10, resulting in the division of Group internal resources and management difficulties.

但他承认，对军工企业目前的发展，但仍有许多问题：一是超过50个，境内外军工上市公司是非常广泛的分布，规模较小，多数的是困难的，集团采取利用资本公司扩大规模和实力的主要目标；第二，就具体情况的军工企业，持有上市公司企业的数量，有的甚至达到10多个，在出现的分裂集团内部资源和管理上的困难。

The first part introduces the incentive models of actual bonus stock synoptically,analyses the stock on hand,option shares and stock option,the three kind of important incentive models,on rights and incumbencies,value and the incentive guidance by contrast.The second part discusses the difficulties and influential factors in the design of technical bonus stock,quests for the incentive models of technical bonus stock,analyses superiority and inferior position in action,difference and interosculation between them,discusses the need and significance for the technical bonus stock reanimation in the middle-small technicalfilms.

本文内容共分为五章三大部分，第一部分概括性地介绍了现行股权激励方式，对现股、期股和期权这三种重要的激励方式，从权利义务、价值和激励导向三个方面进行了对比分析；第二部分探讨了技术股权设计的难点和影响因素，讨论了我国中小科技企业技术股权激励的方式，分析它们在激励中的优势和不足，以及它们之间的区别与联系，并对中小科技企业实施技术股权激励的必要性和意义进行了探讨。

The main difficulties in the study of the dimension of the intersection lie in that the number of similitudes used in the construction may vary from step to step.

研究这一类交集维数的难点主要在于每一层迭代中相似变换的个数总是变化的。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。