查询词典 difficult problem

Accordingly, predicting earthquake before its occurrence becomes a world-class difficult problem, challenging mankind's wisdom and inwit.

从两千年前张衡的《地震对策》到今日日本的《地震对策方案》，均反映了人们对地震灾害的确严重关切及所能采取地防震减灾措施；但对其预测预报，仍是不得其门而入，特别是震前预报更是世界级的难题，考验着人类的智慧和良知。

Keeling said the problem with the sewer lines in downtown is that the buildings are built right over them so they are difficult to work on.

基林说，与下水道的问题是，市中心的建筑物是正确的对他们了，他们是很难工作。

Since long, because of different requirements when working ,belt running leanly in movement ,the carrying idler's short service life, on-site maintenance big work load and so on many breakdown reasons and crucial understanding insufficiency, have made the carrying idler's function research and manufacture not be broken through, These make the carrying idlers to transport the material in inexpensive economic cost expense not to be able to obtain manifests fully, which is one that hasn't good solution of comprehensive technical difficult problem.

长期以来，由于对皮带托滚在输送机上所处不同工况性能要求，运行中存在皮带易跑偏，易损坏，托滚使用寿命短，现场维护工作量大等诸多故障原因及关键性认识不足，因而造成了对皮带托辊的功能研究和制造无重大技术突破，使皮带输送物料的最佳效果的低廉的经济成本费用未能得到充分体现，是一项没有得到较好解决的综合性技术难题。

The research contents with main full text and research results are summarized as follows:First of all , estimate the inaccurate difficult problem consuming time to the cost while making products quotation course, improve the existing index and predict the law levelly and smoothly with the fuzzy mathematics theory, propose the fuzzy similar comparative law builds and constructs the cost to appraise models, thus the speed and precision of improving the cost and estimating greatly .

全文主要的研究内容和研究成果概括如下：首先，针对制造产品报价过程中成本估算不准确、耗时的难题，用模糊数学理论改进现有的指数平滑预测法，提出模糊相似比较法建构成本估价模型，从而大大提高了成本估算的速度和精度。

At present,the analytic tools used for the power signals in microcomputer protection include FFT,Kalman filter and finitely shock response filter,etc.They are effective to analyze stationary signals but localizable for unstationary signals analysis.Especially it is difficult to identify nonlinear fault,e.g,the nonlinear high impedance short trouble is along-term unsolved problem of power system.

目前，用于微机保护中的电力信号分析工具有FFT、Kalman滤波器、有限冲激响应滤波器等，它们对于平稳信号的分析是高效的，但在分析非平稳信号中有其局限性；尤其对非线性故障识别困难，如探测高阻抗非线性短路故障便是电力系统一个长期没有很好解决的问题。

The difficult problem, hard to be resolved in the traditional intellectual property law and the personal rights protection of the civil law, seems to be settled by the unfair competition law and merchandisable right. But the subjective value estimation about the doctrines of well-known and good faith and unfair competition makes the protection of the titles of work unstable.

传统的知识产权法和民法中人身权难以解决的问题，在反不正当竞争法和商品化权中似乎找到了答案，但知名性、诚信原则、不当竞争等主观价值判断又给作品标题的保护带来了不稳定性。

This is the famous Needham difficult problem.

这是著名的&李约瑟难题&。

This question is called by the academic circles it the latter Needham difficult problem.

这一问题被学术界称之为&后李约瑟难题&。

In the very abundant vehicle the most special place, not crosses the hideaway to raise the type loudspeaker design in afterward gate, matches the entire vehicle nine Boston speakers with 100 tile heavy low sound boxes, broadcast music has extremely is on site to shock, specially the low and deep abundant heavy bass effect, lets very abundant as if momentarily can the incarnation become the personal faction to the motion sound box, but above the suitcase dismantable charges automatically the LED flashlight, except can solve the difficult problem which needs to illuminate temporarily, is prompted by a sudden impulse the wish nightwalking exploration is not the question.

酷博车内最特别之处，莫过隐藏于后尾门的下掀式喇叭设计，搭配全车九支Boston扬声器与100瓦重低音箱，播放音乐极具临场震撼，特别是低沉雄厚的重低音效果，让酷博仿佛随时能够化身成为私人派对的移动音箱，而行李箱上方可拆卸的自动充电LED手电筒，除了能解决临时需要照明的难题，心血来潮想要夜游探险也不是问题。

According to AD curve with AS curve nodical decision is real always yield and the general and balanced principle of price total level, be described like can correct ground and analyse each years of AD, the actual mobile contrail of AS curve, will conduce to the settlement of above difficult problem undoubtedly.

根据AD曲线与AS曲线的交点决定真实总产出和价格总水平的一般均衡原理，如能正确地描述和分析各年AD—AS曲线的实际移动轨迹，无疑将有助于以上难题的解决。

A backer of an Afghan law that critics say legalizes marital rape has rejected the international outcry as foreign meddling.

饱受批评的一项法律的拥护者说合法化的婚内暴力不会受国际舆论的干涉。

Years ago, a ancient Egyptian fleet went to the Land of punt for seeking a kind of flavor named "myrrh", and aromatic plants which has dense exotic style for the queen Hatshepsut.

3500年前的一个古埃及的舰队到&彭特之地&寻找一种叫没药的香料。