难以

It simulates the human thought and the decision-making process, and solves the control difficult problem of complex system that describing is very difficult with the precise mathematical model (differential or difference equation).

基于知识驱动的拟人智能控制系统，是一种模拟人类思维和决策过程，解决难以用精确的数学模型来描述的复杂系统的控制难题的一种全新的控制系统。

This is not a new issue, but it is a difficult one.

这不是一个新问题，但却是一个难以解决的问题。

It is a difficult question to answer.

这是一个难以回答的问题。

Public emergencies in ethnic regions are characteristic of concealment,complexity,uncontrollability,diffusibility,and internationality.

民族地区突发公共事件具有特殊性，如隐蔽性、复杂性和难以控制性、易于扩散蔓延性、国际性。

Because Digital Elevation Model is abstract data, it is difficult to understand and take in.

因为数字高程模型的单纯数据的抽象性，既难以理解，也接受困难。

These conflicts came forth not only because the managers lack mature managing experiences for long-time detached management in urban and rural area, but also for various glossaries and uncertain boundaries of URIA, theory system of which is digressive from application, Consequently, hard to be put into practice effectively.

这些矛盾的出现一方面由于长期以来我国城乡分治，对城乡结合部缺乏成熟的管理经验；另一方面是因为城乡结合部概念繁多，范围不定，对城乡结合部的理论研究与实际应用脱节，难以有效地应用于实践。

The Putuo-District District educates the human resource the management the key problem that system application exsits has:Idea, the new technique cans not get the valid expansion;The work efficiency is low, repetition labor, data redundancy;The information renews the ability with the data low, respond the dilatoriness;The inner part shares the ability with the exterior information low;The human resource manages the personnel to is hard with system to match the etc., producing the reason of these problemses are: the personnel information management cant keep up with the reformed step of the system, the information turns developments lack to unify the programming with the roughly personnel information in character system that manage, the personnel turns development etc..

普陀区教育人力资源管理系统应用存在的主要问题有：观念滞后，新技术得不到有效推广；工作效率低，重复劳动，数据冗余；信息和数据更新能力低，反应迟缓；内部和外部信息共享能力低；人力资源管理人员与系统难以匹配等，产生这些问题的原因是：人事信息管理无法跟上体制的改革的步伐，信息化建设缺乏统一规划和管理，人员的素质制约人事信息化发展等。

Meanwhile, crude oil is up merely 60% in the past three years, which makes it seem very bearable in comparison. U.S. stock prices have barely eked out a 10% advance since 2005, underscoring the diminishment of our buying power.

于此同时，原油的价格在过去三年里仅上扬了60%，对比起来，这似乎更容易被人接受。2005年以来，美国股票价格几乎难以维持10%的预付款，突出显示了我们被削弱了的购买力。

A new structure tensor integrating the second-order directional derivative information is designed, which can precisely analyze complex weak edges in the image.

摘要一致性扩散是分析图像中定向结构的重要的预处理步骤，现有的一致性扩散图像增强方法难以识别图像中的弱边界。

It is usually that the solution for the Dirichlet problem can not be obtained actually. With the development of computers, people pay more and more attention to the numerical solution. Many ideas and methods have appeared. Among them the finite element method has become most popular. But the finite element method has some weaknesses and limitations too. First, it is not fit to higher-dimensional problems.

绝大多数Dirichlet问题的解析解往往难以得到，随着计算机技术的发展，Dirichlet问题的数值解法越来越受到人们的重视，新的思想和方法不断涌现，其中有限元法已经发展成为目前求解Dirichlet问题的最主要的数值方法，但是有限元法解决该问题时，存在着一些弱点和局限。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。