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三大难题
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  three difficult problems
     Consolidated statements accounting is considered as one of the three difficult problems by the international accounting field.
     合并会计报表是当今国际公认的会计三大难题之一,这既是一个复杂的会计操作性难题,也是一个包容着众多不同理论流派、争议较大的论题。
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     This paper points out the three difficult problems that our existing social guarantee system is found to meet and yet unable to solve after China entered WTO.
     本文指出我国现行的社会保障制度在“入世”后所面临必须解决的三大难题 ,而现行的社会保障制度难以满足解决这三大难题的要求。 主要表现在 :难以解决人口老龄化的问题 ;
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     2. Artificial grassland be faced with three difficult problems—soil erosion, weeds and diseases and pests: 3. Strategy: to reside the development in the reformation.
     2、人工草地面临的三大难题; 3、对策:寓开发于改造。
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     Academic research and practical explosion to the three difficult problems is becoming the key for development of Chinese society.
     对这三大难题的理论研究和实践探索 ,将构成中国社会发展的关键性前提
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     Application, research and development of ADI as new engineering material have different request when the work condition is different, and have three difficult problems in technique, processing and equipment.
     新型工程材料奥贝球铁的产品研发及应用,在不同的工况下要求各异,同时存在着工艺、设备及加工三大难题
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  three difficulties
     There are three difficulties in therapy of tumour for a long time:①radiation&chemotherapy as the way of routin escheme have low distinctive to other tissues;
     长期以来肿瘤的临床治疗一直存在三大难题:①常规的放化疗方案选择性较差;
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     Three difficulties of bind coal lightingup,stabized burning and burning-out are analysed according to the YangQun bind coal burning characteristic and the W-flame boiler technological properties.
     针对阳泉无烟煤的燃烧特性和W火焰锅炉的技术特点,分析了阳泉二电厂W火焰锅炉如何解决无烟煤的着火难、稳燃难和燃尽难的三大难题
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     Conclusion Module Teaching on Community Practice has overcome the three difficulties of the time, space and personnel that exist in the practice teaching. It helps to bring up general making of the students of the nursing specialty and improve teaching quality of community care.
     结论社区实习模块教学解决了普通高专护生社区护理实践教学中存在的时间、空间和人间三大难题 ,有利于培养护生的综合素质 ,改进社区护理教学。
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     This paper delves into the Management But-Out through analyzing Trust-agent theory, three difficulties in functioning MBO, and the purpose and motivation of MBO, considering the present economic situation in China.
     文章结合我国的经济现状 ,从委托———代理理论、MBO运作中的三大难题、实施MBO的目的和管理层的动机上对管理层收购进行了深入分析。
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     Form combination is a key project in current accounting theory and practice and is one of the three difficulties in accounting operation. In order to suit the development of enterprise grouping and the international practices, it is of great necessity to study ways to develop form combination theory and practice with Chinese characteristics in the light of the present national situation and the experience abroad.
     合并报表是当前会计理论和实务中的重要课题,是会计操作中的“三大难题”之一,为适应我国企业集团化的发展,实现与国际惯例的接轨,很有必要研究如何从国情出发,借鉴国外经验,发展有中国特色的合并报表理论和实务。
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  “三大难题”译为未确定词的双语例句
     The paper introduces the study of technology of face recognition and describes three difficult problem of application.
     论文首先介绍了人脸识别技术的研究内容以及现状,指出了影响人脸识别技术应用的三大难题
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     But there are three problems which are future trouble of The People Bank of China, the coordination of currency policy and banking supervision, meeting the challenge of WTO for the banking supervision and management industry.
     但是,中国人民银行金融监管的遗留问题,银监会成立后货币政策与银行监管的协调,银监会应对入世挑战等问题,成为了摆在银监会面前的三大难题
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     Following the rapid development of Internet, knowledge management is confronted three problems, which are information overload, non-structure information and implicit knowledge.
     随着Internet的飞速发展,知识管理面临信息过载、非结构化以及隐性知识的三大难题
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     With a new proposed process of combining grinding fineness with reagent rate,these problems have been solved. The results show that the gold concentrate grade is increased from 39.43% to 53.19% and overall recovery of gold flotation-cyanide leaching from 80.92% to 90.54%.
     针对这些难题,提出并研究了磨矿与药剂组合的新工艺,使浮选金精矿品位由39 43g/t提高到53 19g/t,金浮选-氰化浸出总回收率由80 92%提高到90 54%; 解决了所存在的三大难题
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     Starting from these there problems, the treatise tries to provide further analysis on common sense morality and ideology.
     文章从这三大难题入手,对常识道德和意识形态问题做出分析,试图表明:西季威克倡导的常识道德,以及罗蒂的"种族文化传统",其实质是一种意识形态。
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  three difficult problems
There are three difficult problems in the application of genetic algorithms, namely, the parameter control, the premature convergence and the deception problem.
      
  three difficulties
The existing theory of the origin of the universe has three difficulties, it predicts an absurd 'cosmological constant', some stars seem older than the universe and the expansion seems to be speeding up.
      
The purpose of this paper was to suggest the basic terms of a schema for the description of the values and the processes of valuing of the individual person and to explore three difficulties that stand in the path of satisfactory description.
      
Three difficulties-culture shock, prejudice, and ethnocentrism-are followed by principles of transcultural hospital pastoral care, the significance of hospitalization, and a case history.
      
Beyond this, there are at least three difficulties in attempting to assess the specific impact of performance budgeting.
      
However, the behavior of the random walker algorithm in the presence of the three difficulties outlined above distinguishes it from other approaches.
      
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The developments of communication mechanism are divided into three tides, i.e. superheterodyne, phase coherent and spread spectrum principles. Among which spread spectrum communication principle is one of the most effective means of seeking existence in a war theatre communication. This is used for protection against eaves, direction and intentional or unintentional interference.In the information age of molecular electronics and in electronic war of comprehensive using acoustics, electricity, optics and magnetics,...

The developments of communication mechanism are divided into three tides, i.e. superheterodyne, phase coherent and spread spectrum principles. Among which spread spectrum communication principle is one of the most effective means of seeking existence in a war theatre communication. This is used for protection against eaves, direction and intentional or unintentional interference.In the information age of molecular electronics and in electronic war of comprehensive using acoustics, electricity, optics and magnetics, the developments of LSI, CCD, SAW and MSW functional devices open a new way to overcome three difficult problems in the spread spectrum communications.The paper consists of eight parts: 1. The mechanism, frequency band, performance, present state and potential applications of three new functional devices in the spread spectrum communication. 2. Theoretical basis and physical contents of SAW spread-spectrum communications. 3. The generationof SAW-TDL-MF spread-spectrum codes and mathematical description of despread-spectrum mechanism. 4. The controllable programming mechanism of SAW-TDL-MF. 5. Matched filter and recirculating integrator of the serialparallel to spread-spectrum communications. 6. The double convolvers of surface acoustic wave to spread-spectrum communications. 7. Programm able correlator with SAW chirp transform. 8. The mechanism of the adaptive receiver with SAW devices.

通信机理之变革,经历了超外差原理,相位相干原理,扩跳原理之三大浪潮。扩跳原理最能抗御敌人的窃获、测向和干扰,是战场通信中求生存的最有效手段。 在声、电、光、磁综合利用的分子电子学之电子战的信息对抗时代,大规模集成电路(LSI)、电荷耦合器件(CCD)、声表面波(SAW)和静磁波(MSW)等新型器件的研制,为解决扩频通信之三大难题开辟了新途径。 本文主要阐述三种新型功能器件在扩频通信机中的应用机理、频段、性能,现状与潜力。特别强调了新型器件之卷积器、相关器与匹配滤波器为基础的扩频通信机的设计思想与制作方法。

In this paper the following three contents was discussed: 1. Some characteristics of secondary tropical grassland at Hainan Island; 2. Artificial grassland be faced with three difficult problems—soil erosion, weeds and diseases and pests: 3. Strategy: to reside the development in the reformation.

本文论述了以下三个内容:1、海南岛热带次生草地的一些特点;2、人工草地面临的三大难题;3、对策:寓开发于改造。

o seek a way of developing low pressure and low permeability oil reservoir,Changqing Oil Field and Xi'an Petroleum institute drilled a horizontal well in co-operation in Ausal Oil Field (North Shaanxi).The deviated depth of the well is 1658. 27m. the vertical depth is 1259. 19m and the length of the horizontal section is 236. 17m.A new low solids, non-dispersed polymer drilling fluid- AML was used in drilling the well' AML consists mainly of three kinds of additives. One is amphionic polymer(A). The second is...

o seek a way of developing low pressure and low permeability oil reservoir,Changqing Oil Field and Xi'an Petroleum institute drilled a horizontal well in co-operation in Ausal Oil Field (North Shaanxi).The deviated depth of the well is 1658. 27m. the vertical depth is 1259. 19m and the length of the horizontal section is 236. 17m.A new low solids, non-dispersed polymer drilling fluid- AML was used in drilling the well' AML consists mainly of three kinds of additives. One is amphionic polymer(A). The second is an inorganic polymer MSF-2 (M). The third is lubricants (L). Laboratory and field tests proved that AML drilling fluid is able to overcome the major drilling fluid problems in drilling horizontal wells in Ausal Oil Field,such as hole cleaning, wellbore stability, lubricity and antisticking. The technique of carrying stone cuttings by laminar flow to horizontal well drilling was applied. A compromise was made between the drilling fluid filtration and mud cake's quality. The inhibitive property of the amphionic polymer drilling fluids was improved. The cross-correlation of multi-function additives in the drilling fluid system was further discussed.

为探索用水平井技术提高安塞油田低压低渗薄油藏的单并产量,长戾油田与西安石油学院合作钻成了一口井深1658.27m、水平并段长度236.17m的水平井—塞平一井.该井采用新研制的AML低固相钻井液在现场应用中较好地解决了井眼净化、井壁稳定、润滑防卡水平井钻井液的三大难题,配合工程措施顺利地钻成了这口井.在应用中探索了水平井使用层流携屑的措施,实现了聚合物钻井液滤失性与泥饼质量的统一,解决了两性离子聚合物钻井液抑制能力不足的缺陷,探索出钻井液复合技术,对钻井液工艺有新发展.

 
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