Separation of Cu, Zn and sulphur has been a difficult problem for a long time.
铜锌硫多金属矿石分离历来是选矿界的难题。
How to keep on talent has been a difficult problem of state enterprise human resources management.
如何留住人才成为国企人力资源管理中的一大难题。
The supporting of permanent openings has been a difficult problem in production and technique for many years.
永久洞室的支护方法，多年来一直是松软岩层矿井生产的技术难关。
Separation of copper, zinc and sulphur complex ore has been a difficult problem in the mineral processing field.
前言：铜锌硫多金属矿石分离一直是选矿界的难题。
It has been a difficult problem for technical personnel to estimate the yarn consumption ratio in the technological design of jacquard fabric.
提花织物工艺设计中的用纱比确定一直是摆在技术人员面前的一道难题。
The treatment of waste gas with lead from the molten-lead pat has been a difficult problem. A Practical and economic treatment method is introduced in this paper.
熔铅锅产生的含铅废气的治理一直是没有得到解决的难题．本文介绍了一种切实可行、经济有效的治理措施。
The carrier magnetic disturbance which make magnetic deviation of the navigation equipment and influence geomagnetic measurement precision has been a difficult problem at all times.
载体磁场对地磁测量的干扰，一直是造成导航设备罗差、影响地磁测量精度的技术难题。
The carrier magnetic disturbance which make magnetic deviation of the navigation equipment and influence geomagnetic measurement precision has been a difficult problem at all times.
载体磁场对地磁场的干扰，一直是影响导航罗差、地磁测量的技术难题。
Due to the differences between Chinese and English culture and the differences between Chinese words and English words, the translation of the allusions has been a difficult problem.
由于汉英文化差异及词义差别，典故成语的翻译一直是翻译实践中的一个难点。
The interference of carrier magnetic field to geomagnetic field has been a difficult problem for a long time, which has influence on navigation compass deviation and geomagnetic measurement.
载体磁场对地磁场的干扰，一直是影响导航罗差、地磁测量的技术难题。
The interference of carrier magnetic field to geomagnetic field has been a difficult problem for a long time, which has influence on navigation compass deviation and geomagnetic measurement.
载体磁场对地磁测量的干扰，一直是造成导航设备罗差、影响地磁测量精度的技术难题。
The problem of university graduates finding jobs has been debated in the media for at least a decade as a difficult social issue and it never improves.
大学毕业生的就业问题是社会的难题在媒体上已经讨论了至少十年了并且从没有得到什么改善。
Applying information technology to the problem has been a difficult task, even though some of the purely administrative benefits are easy to imagine.
应用信息技术解决这个问题很困难，尽管很容易获得一些纯粹行政方面的好处。
How to construct a reasonable safeguard system of financial reporting information quality to promote financial reporting information quality has been a worldwide difficult problem.
如何构建一个合理的财务报告信息质量保障体系以提升财务报告信息质量，已成为一个世界性的难题。
Refractory epilepsy is with increased morbidity and mortality and poor prognosis, it has been always a difficult problem to neurological doctors.
难治性癫痫预后差，具有较高的致残率和病死率，是困扰神经科医生的一个难题。
For a long time, the pump cavitation has been regarding as a difficult problem to be resolved.
长期以来，泵汽蚀现象被认为是一个不易解决的问题。
The aging shuttle fleet has been fraught with so many problem that it has been difficult to get a successful launch of late.
老化的航天飞机一直存在着许多问题所以最近已经很难成功发射。
Part of the problem is that it's difficult to keep track of who has requested what, what things have already been discussed into the ground, and what the latest status of a potential feature is.
部分问题是，很难了解谁要求了什么，以及正在讨论什么问题，潜在功能的当前状态是怎样的。
It has been a big and difficult problem that the uncontrolled rocket has large dispersion and low firing accuracy.
无控火箭的老大难问题是散布大，射击精度差。
The contradiction between the realistic and real-time of the shadow rendering algorithm has been a fundamental and difficult problem in computer graphics and virtual reality technology.
阴影绘制算法的真实感和实时性之间的矛盾，是计算机图形学和虚拟现实技术目前所要解决的一个基本难题。
The problem of liquidity risk management has always been a key and difficult one in the field of commercial Banks risk management.
流动性风险管理问题一直是世界各国商业银行风险管理研究领域中的重点和难点问题之一。
This has been in a departmental budget difficult problem.
这一直是部门预算中的一个难题。
Through researching an elastic sensitive element, a bellows with filler has been designed and developed, which solved the difficult problem that a thin wall bellows can't withstand high pressure.
通过对弹性敏感元件的研究，设计制造了带有充填物的波纹管，解决了薄壁波纹管不能承受高压的难题，又保持了较高的灵敏度。
In geotechnical engineering, construction in miscellaneous soil-filling areas has been a key and difficult problem.
在岩土工程中，杂填土区的施工历来是施工项目中的重点和难点部分。
Service quality evaluation has always been a difficult problem of service quality management, most researchers accept the SERVQUAL evaluation method right now.
服务质量评价一直是服务质量管理的一个难题，目前大多数学者都接受的评价方法是SERVQUAL评价方法。
Rapid removing of compressed snow on urban roads has been a problem difficult to solve. There is no efficient and practical machine for it presently.
城市道路压实积雪的快速清除一直是较难解决的问题。目前，仍没有高效实用的除雪机械。
Calculating posterior probabilities and related Bayes factors for a collection of competing models has been a difficult and challenging problem for Bayesian statisticians.
在贝叶斯统计中计算一组竞争模型的后验概率及其相关贝叶斯因子一直是一个较难且有挑战性的课题。
Marine fire hazards evaluation has been a key and difficult problem in fire-fighting decision-making research both at home and abroad.
船舶火灾危险性评估一直是国内外船舶消防决策研究的一个重点和难点问题。
Marine fire hazards evaluation has been a key and difficult problem in fire-fighting decision-making research both at home and abroad.
船舶火灾危险性评估一直是国内外船舶消防决策研究的一个重点和难点问题。
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