出砂是疏松砂岩油藏开发面临的主要难题之一。
Sand production is one of the major concerns in unconsolidated sandstone reservoir development.
随后对图像配准技术所面临的主要难题作了分析。
Then the difficulties of image registration technique are summarized and evaluated.
他们争论的主要难题是，稀土金属如钕的生产通常用来制作磁铁。
The main bottleneck, they argue, could be the production of rare earth metals such as neodymium, which is often used in making magnets.
肿瘤细胞对化疗药物的耐药性是癌症化疗中的主要难题。
The resistance of tumor cells to drugs is a major obstacle to effective cancer chemotherapy.
因此主要难题就是通过VCL在云计算平台上整合同一组织中的异构工作负载。
Thus the main challenge is to consolidate heterogeneous workloads of the same organization on the cloud computing platform through VCL.
初期雨水对河道的冲击污染已成为解决河道污染的主要难题之一。
The lash and pollution of initial rain in river course has become one of the key problems in the control of river course pollution.
AIX管理员面对的主要难题之一是，对系统上运行的各种软件进行维护和升级。
One of the main challenges AIX adminstrators face is maintenance and upgrades of different software running on their systems.
真空的获得和维持是目前MEMS真空封装技术中存在的主要难题之一。
The vacuum obtains and maintenance is still still the main problem in the field of MEMS vacuum packaging technology.
目前提高SAW加速度计精度的主要难题是对其温度误差进行温度补偿。
Nowadays the main difficult problem of improving the SAW accelerometer precision is carrying on the temperature compensation to its temperature error.
目前的主要难题是共享内存的概念和由访问加锁保护的同一数据所引起的争论。
The main problem is the concept of shared-memory and the contention arising from accessing the same data protected by locks.
生产过程中的井壁稳定性和地层出砂问题是剩余油开采过程中的主要难题之一。
Wellface stability and formation sand production in the process of production is one of tough problems in remaining oil production.
从市场投入时间和质量的角度来看，实现应对新的或修改的业务需求的变更仍旧是主要难题。
Implementing changes in reaction to new or modified business requirements is still a major challenge from both a time-to-market and quality perspective.
纤维素酶基因工程的主要难题是如何实现不同组分的有效表达和如何提高表达量。
The main problem in genetic engineering of cellulase is how to achieve effective expressions of different components and how to improve the expression level.
初看起来，这个问题似乎不太复杂，但主要难题是提取与特定的片相关的Quantity。
At first glance, this problem does not seem too complex, but the main challenge faced by the map is in carrying out the extract of the relevant Quantity occurrences for a particular slice.
多动症是困扰童年时期的孩子们的主要难题之一，越来越多的孩子已开始接受贵重的药物治疗。
One of the great problems of modern childhood is ADHD now increasingly and expensively treated with drugs.
目前为止的主要难题是如何把RNA注入到目标细胞。眼睛的可研究性意味着这不再是个难题了。
So far the main hurdle has been getting RNA into the target cells, but the eye's accessibility means this is not so much of a problem.
路基周而复始的冻胀、融沉和热融滑塌是冻土地区道路建设和维护所面临的主要难题。
The continual freezing and expanding, melting and submerging and melting and sinking of roadbed are the main problem on the building and maintaining of road in frozen earth area.
特别是在基层国土执法监察工作中，“执法难、难执法、法难执”一直是其工作的主要难题。
Especially in the supervision of national land at the grass-roots level, being difficult to execute the Law is the main challenge.
分析了山坡地污水处理系统规划设计中存在的主要难题，提出应采用灵活多变的污水处理方式。
The main problems existing in plan and design of wastewater treatment system on the hillside-land were analyzed, and the flexible wastewater treatment ways were put forward.
精神和道德滞后的问题成了现代人的主要难题，它表现在由人们的道德不成熟引发的三大问题上。
This problem of spiritual and moral lag, which constitutes modern man's chief dilemma, expresses itself in three larger problems which grow out of man's ethical infantilism.
消声瓦是潜艇实现声隐身的主要手段，目前生产隐身潜艇面临的主要难题之一就是消声瓦敷设技术。
At the present time, the most difficult problem in manufacturing anechoic submarine is the technique of cladding tile.
提高太阳能发电系统的太阳能利用率、降低发电系统建造成本是太阳能应用领域面临的两个主要难题。
How to improve the utilization of solar power station and how to reduce the costs are the two major problems.
重铬酸钾—硫酸亚铁法主要难题是在计算时无法知道沉积物中有机碳的氧化数，因而所测值不够准确。
Its result has to be colibrated. Because the structure of organic substances is complicated, the number of oxidation valence of carbon is assumed zero when calculating organic carbon.
遗憾的是，使用Ajax方法的主要难题在于XMLHttpRequest对象自动解析xml的详细过程。
Unfortunately, it's in the details of how the XMLHttpRequest object automatically parses the XML where the primary difficultly with the Ajax approach comes into play.
汽油分馏塔设计中的主要难题是如何从工艺及结构上解决气相聚合物和焦化物对填料和气液分布器的堵塞问题。
The main problem in design of gasoline fractionator is how to prevent blocking of gas phase polymer and coke pellets in packing and gas distributor.
跟着酒店行业的疾速开展，酒店之间的竞争到处可见，现代酒店若何停止本钱办理成为酒店行业开展的一个主要难题。
With the rapid development of hospitality industry, hotel, the competition between modern hotel everywhere how cost management has become an important hotel industry development problems.
到目前为止探究CP破缺原因的问题成了目前物理学界的主要难题之一，CP破缺也成了理解宇宙论和粒子物理学的核心。
So explore the cause of the problem CP breaking is the present one of the difficulties problems in physics, CP violation also become understanding of cosmology and particle physics in the core.
反坡富水岩溶隧道施工的主要难题是反坡抽排水，而快速有效地排除反坡施工地段的积水，对隧道的施工组织和现场管理影响重大。
Drainage in a reverse slope is the primary problem in the construction of a tunnel in a reverse-slope stratum with abundant water.
当我们回想起这个故事时，会思考它的主要难题是关于可重新利用资产消耗(RAC)的问题是：在特定的环境下鉴定有重要意义的内容。
We were reminded of this story in thinking about the main challenge regarding reusable asset consumption (RAC) : identifying significant content for a given context.
实时的高真实感图像绘制是计算机图形学中 的主要难题之一，传统 的方法难以在提供 真实感图像绘制结果 的同时保证足够 的绘制速度。
Real-time realistic image rendering is one of the most important and difficult problems in Computer Graphics, previous methods cannot provide highly realistic image in real time.
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