有困难

I've already had great trouble in keeping up with my classmates.

1：我已经有很大的困难跟得上班上的其他同学。

Even incremental innovation is very hard; you really only want to do it if absolutely necessary.

即使是渐进的创新也非常困难，只有绝对有必要的时候才会去做。

To compare with the investigating judge system in Germany, there are some problems in the court system in the criminal investigating procedure in Taiwan. For a court to command a coercive means in the criminal investigating procedure, the legal rules in our Criminal Procedure Law are insufficient. Therefore, the jurisdiction of the court and the process in jurisdictional dispute in the criminal investigating procedure are not clear and definite. The organization of the court in the criminal investigating procedure still is an issue. Also, the order of the authority distribution is not formed yet in our criminal investigating procedure. The limits of authority of the court are indefinite. Even on the form of the court's decision and the grievance procedure, there are different opinions in practice and theory.

就我国侦查中法院之运作而言，对於侦查程序中强制处分及证据保全之权限分配，我国刑事诉讼制度其实亦不乏明文规定，但是，在侦查法官之引进空间下，检视我国侦查程序之现况，可以发现，就强制处分之监督功能而言，由於现行法在制度面上规范之不足，我国侦查中法院之运作，对於其管辖权之划分标准及管辖权错误之处理，产生法律适用之疑虑；法院组织之方式及法院事务分配规则之适用上发生争议；而对於侦查权限之分配，亦存在著法官保留范围狭隘及法院审查权限不明确之问题；甚至，对於侦查中法院之裁判形式及其救济途径之选择，仍有不同之意见，以致於造成我国侦查中法院运作之困难。

In our lives, inevitably there will be many difficulties.

在我们的生活中，不免会有许多困难。

There will be difficulty in popularizing the Man's music widely in the infant school education, because it will be excluded by the traditional teaching means, and it is the objective element that we must consider.

满族音乐在学前教育中推广会有一定的困难和阻力，它会受到传统教学模式的排斥，这是我们必须考虑的客观因素。所以，在推行满族音乐在学前音乐教育中，我们要"求同存异"，循序渐进的开展。

At the same time, the characteristic equations of the controlled systems with time delays are transcendental equations and belong to infinite dimensional systems, so it is difficult to study the time delay systems in mathematics theory and also difficult to obtain good performance for the time delay systems using the controller designed by classical control theory.

同时，由于含有时滞的控制系统的特征方程是超越方程，属于无穷维系统，对时滞系统的研究在数学理论上是非常困难的，有很高的理论价值，而且通过经典控制理论设计出来的控制器对时滞系统很难得到良好的控制效果。

A series of theoretical and experimental studies on the microstrip patch antennas with dielectric superstrates is carried out systematically. Firstly, a comprehensive survey of the microstrip antenna technology and its theories are presented. Then, two analysis techniques, named as the spectral domain Green's function method and the spectral domain integral equation method are developed. The SDGF method is a simplified analysis technique, which takes advantage of the spectral domain immittance approach to find the dyadic Green's function for the stratified media, and obtains the complete closed-form formulas for radiation patterns, directivity, efficiency, gain etc. Some interesting calculated results are presented. The SDIE method is capable of determining resonant frequency, radiation characteristics, input impedance etc, for the covered microstrip patch antennas. Comparing with other full-wave analyses it reduced computation and mathematical labour remarkably. The singularities near the pole location of the surface-wave modes and the difficulty of the integral computation over infinite range of oscillating integrands are dealt with actively and documented well. Results predicted by the SDIE method agree extremely well with our experimental results for resonant frequencies of various superstrates. The superstrate effects on impedance and radiation characteristics also have been investigated experimentally so that the gap due to lack of measured data and computed results for multi-layered superstrate has been filled to some degrees and two useful observations have been achieved for weakening the resonant frequency shift and optimizing the microstrip antenna gain. As a meaningful application, the design and analysis of a 4×4 patch array are introduced.

实用微带天线普遍加介质覆盖层来防护热，物理损伤和环境影响，也可能在飞行或严酷气候条件下自然形成覆盖层本论文对带介质覆盖层的微带贴片天线系统地作了一系列理论和实验研究首先，对微带天线技术和理论作了全面的综述然后，发展了两种分析方法，称为谱域格林函数法和谱域积分方程法SDGF法是一种简化的分析技术，它利用谱域导抗法来求得分层媒质的并矢格林函数，并得出方向图、方向性系数、增益等参数的完整的闭式公式，给出了一些令人感兴趣的计算结果SDIE法能确定介质覆盖微带天线的谐振频率、辐射特性和输入阻抗等与其它全波分析方法相比，它明显减小了计算量和数学工作量已有效地处理了表面波模极点附近的奇异性和对振荡的被积函数的无限区间积分计算的困难对于不同覆盖层情况下的谐振频率，由SDIE法所预示的结果与我们的实验结果吻合得很好对于覆盖层对阻抗和辐射特性的影响也已作了实验研究这在某种程度上填补了缺少实验数据和计算结果之间的间隙，并得出了缓解谐振频率偏移和优化天线增益的两点有用的结论作为有意义的应用，介绍了一个4×4元矩形贴片天线阵的设计和分析。

But , when we changeour trainofthought , we can find that sometimes using mathematical Analysis is a better solution to the linear algebraic problems.In thispaper, use the propertyofcontinuous function andimproper integralof infinite interval and to solve some matrix and quadratic form problems.Algebraic ideas andmethodstosolvemathematical analysisproblems are indicated by several specific examples. Close contactof differentmathematical analysis fields is shown.

该文探讨运用数学分析的有关知识（如：函数连续性、无穷区间的广义积分）和方法解决高等代数中的某些复杂、繁琐的问题；通过具体的实例，阐述高等代数的思想和方法在解决数学分析问题中的作用，揭示不同的数学领域之间的密切联系，例如：二次型与正交变换是代数学的基本内容，其用途十分广泛，而重积分的计算往往存在技术性的困难，若利用"二次型"与"正交变换"的有关理论去解决某些重积分的计算问题是颇有功效的。

He is ingenious at solving difficult problems.

他在解决困难问题上有一套。

The idea is that, amidst the stress of 21st century life, a woman finds it increas ingly difficult to spend time which is exclus ively for her and is not encroached upon by the non-stop demands of work and family.

它传递的思想是，在21世纪的生活压力下，女性想要有一段时间可以专属于自己，并且免受工作和家庭中无休止的任务摆布，是越来越困难了。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了