Sample complementing is the practical demand of sampling survey, and its also a difficult problem in sampling technology.
样本追加是抽样调查的现实需求，也是一个抽样技术难题。
In the theory of elastic thin plates, the bending of a free rectangular plate on the elastic foundation is also a difficult problem.
在弹性地基上的自由矩形板的弯曲，在弹性薄板理论中也是个难题。
Technique of three-dimensional object recognition is one of the most important techniques in video tracking system and also a difficult problem in it.
三维目标识别技术是电视跟踪系统中的关键技术之一，也是目前该领域亟待解决的一个难题。
Establishing and improving software process capability is the requirement of the high maturity level of CMM or CMMI, and also a difficult problem of software measurement.
建立和改进软件过程能力是CMM或CMMI高成熟度等级的要求，也是软件度量的一大难点。
Waterproofing materials in the construction of the protection and leakage after maintenance is also a difficult problem, after any part of the penetrability of the damage.
防水卷材在施工后的保护和漏水后的维修亦是难题，任何部位的贯穿性破损。
And it is also a difficult problem that there had no standard, practical, continued development of methods and techniques during the development of the communication network management systems.
而在通信网络管理系统开发中没有一个规范、实用和持续的开发方法和技术，也一直是网络管理建设中的难点问题。
They also have a succession problem: if the founders want to retire, they can find it difficult to realise the value of the business.
他们也存在继承问题：如果创始人想退休，他们会发现公司的价值很难实现。
Also, you can solve a problem in more than one way in PHP and the dangers of making painful mistakes that become difficult to fix later are never far away.
而且，在php中，解决问题的方法不止一种，比较容易犯那种惨痛的错误，这种错误过后难以订正。
Ronaldo also revealed that he suffered from a thyroid problem that had made it difficult to control his weight.
罗纳尔多更坦言患有甲状腺疾病，难以控制自身体重。
Nanjing is not exceptional also, power, energy saving is the imminent matter, but in the end the limit who Electric is a difficult problem to solve.
南京也不例外，限电、节电是迫在眉睫的事，但到底该限谁的电也是一个很难解决的问题。
The geological prediction of tunnel is an important problem for construction quality and safety, and also a difficult object for engineering geophysics.
隧道地质超前预报关系到隧道工程施工质量和安全，是国内外研究的前缘课题，也是工程地球物理研究中的疑难问题之一。
In auditing system about network security, the technology about information catching and reverting is a difficult problem. At the same time, it is also foundation problem.
信息捕捉与还原技术是网络安全技术中审计系统实施的一个难点，同时也是实现审计系统的基础。
Multitarget interception is a big difficult problem in ballistic missile defense, and is also the most arduous technology of the missile defense system of US.
多目标拦截是弹道导弹防御的重大难题，也是目前美国导弹防御系统所遇到的最大的技术难点。
The rainstorm disaster is one kind of worldwide natural disasters, simultaneously it is also a worldwide difficult problem.
暴雨灾害是一种世界性的自然灾害，同时也是一个世界性的难题。
As the front processing unit in an infrared imaging system, target detection is one of the important parts in precision-guidance and is also a critical technique or difficult problem.
目标检测作为红外成像系统中前端的处理环节，是精确制导中一个重要的组成部分，也是其中的一个关键技术和难点问题。
The study on a frozen wall forming affected by seepage water is not only an important and difficult problem , but also an urgent one to be solved in the Artifical Ground Freezing engineering.
研究渗流水作用下冻结壁形成是冻结法凿井的一个重点和难题，也是冻结工程迫切需要解决的问题。
The stereo matching is a key problem of computer vision, and also is the difficult problem.
立体匹配是计算机视觉领域的一个关键问题，同时也是难点问题。
The technical difficulty in flood discharging energy dissipation of the Xiaowan arch dam body leads the world and its plunge pool optimization design is also a major difficult problem of the project.
小湾拱坝坝身泄洪消能的技术难度已达世界当前最高水平，其水垫塘的优化设计亦是工程中的一大难题。
The breakthrough of the constraints has become not only the most difficult problem and bottleneck in development cared by the industry, but also a hot spot and focus to academic researchers.
怎样突破电子商务市场的支付手段的制约，一度成为业界最为关切的重大难题，也是学界研究的一大热点问题。
This problem has been plaguing the industry, organic cotton products are also difficult to sell in the market, a serious problem.
这个问题一直以来困扰着业内人士，也是目前有机棉产品很难在市场上销售的一个严重问题。
Raising initial funds is a difficult problem for college students' innovative undertaking, and it is also a hot topic concerned by all related institutions in our country.
筹集创业启动资金是困扰大学生创业的一大难题，也是当今国家各有关部门积极探讨的焦点问题。
In addition, cavitation is a difficult problem in hydraulic machinery. On the basis of a great deal of literature review, the author is also involved in the design of cavitation test facility.
另外，汽蚀一直是水力机械的难点问题，在阅读大量相关资料的基础上，积极参与设计了泥泵汽蚀试验装置。
Determination of the bending strength of gear teeth of circular-arc profile gear is very difficult due to many unknown factors, which would be also a complicated problem in the field of elasticity.
确定圆弧形齿轮轮齿强度将涉及到很多因素。就是在弹性理论上来看也是一个复杂的课题。
Determination of the bending strength of gear teeth of circular-arc profile gear is very difficult due to many unknown factors, which would be also a complicated problem in the field of elasticity.
确定圆弧形齿轮轮齿强度将涉及到很多因素。就是在弹性理论上来看也是一个复杂的课题。
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