查询词典 difficult problem

The problem for students of English I that phrasal verbs are more difficult to understand than you think.

对于学英语的学生来说，问题在于动词短语理解起来比你想得更难。

The problem for students of English is that phrasal verbs are more difficult to understand than you think.

对于学英语的学生来说问题在于动词短对于学英语的学生来说问题在于动词短语比你想象的更难理解。

This problem is so difficult that only a few physic can work it out.

这个问题困难到只有一些医术可以解决它。

However, the ocular of hydraulic systems working condition is bad. It is difficult to obtain the parameter of hydraulic system. The fault of hydraulic system has pilosity nature, uncertainty and disguise. The fault sign and the fault reason of hydraulic system have complex non-linear mapping relations, therefore it cannot use the simple functional relation to describe. This has brought the difficulty for the classics fault diagnosis technology. The intelligent diagnosis technology base on ANN and ES can solove the above problem well and the diagnosis result is more accurate and reliable.

但是，液压系统工作状况直观性差，参数不易获取，故障具有多发性、不确定性和隐蔽性；液压系统故障征兆与故障原因之间存在复杂的非线性映射关系，不能用简单的函数关系来描述，给经典故障诊断技术带来了困难，而基于神经网络和专家系统的智能诊断技术很好的解决了上述问题，使诊断结果更加准确可靠。

Solving singularly perturbed equation with turning point is a difficult problem.

引 言关于奇异摄动问题的讨论，近年来一直受到国际国内学者的充分关注[1]。

It is a difficult problem in 3D DDA to detect the contact between arbitrary shape polyhedral blocks.

块体间高效而正确的接触判断，是实现三维DDA法计算的关键。

It is a difficult problem in three-dimensional DDA to detect the contact between arbitrary shape polyhedral blocks.

块体间高效而正确的接触判断，是实现三维块体系统非连续变形分析方法计算的关键。

In this paper, a modified polynomial method is presented, which can solve this difficult problem to a certain degree.

本文中提出的改进的符号多项式模型方法能在一定程度上解决这一难题。

The classical cutting stock algorithm——column generation technology , and wrap up rectangle technology for abnormity are analyzed ; The development of AutoCAD with ObjectARX is studied and the generating method of cutting outline drawing and layout drawing were found out on the basis of analyses of the graph database structure of AutoCAD and the basic operation of it ; The process planning technology of plate material cutting orienting numerical control is studied a process planning method directly based on layout drawing is established ; The emulation technology in AutoCAD is studied and a kind of dynamic emulation method is put forward , which is realized by incrementally modifying graph entity ; The postposition of NC program of the integrated cutting system constructed on software plug-in is proposed , which can effectively solve the problem that it is difficult for a numerical control programming system to be common , which is caused by the difference of instruction format and control parameter between different type of numerical control machine .

分析了经典的矩形件优化排样算法——列生成法和针对异形件的矩形包络算法；研究了基于ObjectARX 的AutoCAD 开发技术，结合对AutoCAD 图形数据库结构及其基本操作的分析，给出了下料轮廓图和排样图的生成方法；研究了板材数控下料加工的工艺处理技术，建立了一种直接基于排样图进行的图形交互工艺规划方法；研究了在AutoCAD环境中的板材下料数控仿真技术，给出一种通过增量修改图形实体对象实现的动态仿真方法；提出以软插件技术构建集成下料系统的数控编程后置处理部分，能够有效解决因数控下料机床指令格式及控制参数不统一导致的自动编程软件系统不易实现通用性的问题。

In recent years, the social postposition effect that enrols as college enlarge is highlighted, college graduate increases substantially, obtain employment difficult question already became social heat, obtain employment leads a problem to enter a college from socioeconomy domain, become a society gradually the focus of extensive controversy.

近年来，随着高校扩招的社会后置效应凸显，高校毕业生大幅度增加，就业难问题已成社会热点，就业率问题从社会经济领域进入高校，并渐成社会广泛争议的焦点。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。