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Since it is very difficult to established the model via ANSYS software, UG software is used to set up the model. In the fourth chapter, the bus body"sstructure are analyzed by ANSYS software. Three work situations of bus body are discussed, which are bend work situation, torsion work situation and crankle work situation. The stiffness and strength of bus body"s structure are calculated to guide the design of bus bodys structure.

由于使用ANSYS软件建模很不方便，本文使用UG软件建模，利用UG软件的图形数据转换接口，将作好的模型导入ANSYS中处理；第四章主要是介绍了如何使用ANSYS软件进行客车车身结构的分析，文中讨论了客车的三种使用工况，弯曲工况、扭转工况和弯扭工况，计算了客车车身的结构强度和刚度用于指导客车车身结构的设计。

This is why the skeptics find it so difficult to accept what is happening now, they can't fathom the idea that one day they may have to survive in a world devoid of all the creature comforts they have come to cherish.

这就是为什么有人觉得那么难以接受，现在正发生的，他们不能量度的想法，有一天他们可能要生存，在这样的世界空洞的所有舒适，他们都来珍惜。

It is difficult to classify him to realism, expressionism even surrealism; the space of non-depth and emptiness, and the plane image without cubage does not need too many skills of oil painting and don't carry the burden of technique, which is more suitable to his free expression.

我们很难把他归类到写实的、表现的，甚至是超现实的；那种无深度的虚无的空间，无体积的平面化的形象，似乎都不需要过多的油画技巧，而且没有技巧的包袱，更适合于他的自由的表达。

Two problems were solved in numerical calculation, one was that a term of 1/r in Maxwell was divergence in cylindrical center where r=0, another was that the value of optical field at cylindrical center was difficult to decided when the cylindrical center set as a boundary condition in Maxwell equation, So the values of optical field need just calculate from cylindrical center to cylindrical boundary, comparing from cylindrical boundary to cylindrical boundary, near upon half CPU time and RAM saved.

计算中解决了在圆柱中心线上Maxwell方程存在发散项1/r以及用圆柱中心线作为边界条件时，中心线上光场值难确定的问题，因而光场只需从圆柱中心计算到圆柱边界，和以圆柱的两条边做为边界条件比较，节省了将近一半的计算时间和计算机存储空间。

Research of mobile phone configuration evaluation method by man-machine communication With regard to creative design, it is difficult to determine an appropriate evaluation function to make decision.

人机交互的手机造型评价方法研究对于有创意的设计，我们很难给出一个确定恰当的目标函数进行统一的评判。

They are difficult to understand and frustrate and demoralize those unlucky enough to have to work with them.

他们很难理解并受挫，为那些不幸的人感到沮丧，不得不和他们一起工作。

One is that how to demount the wheel and the output shaft that were too difficult to demount in the L60 vertical axial-flow fan s,the other problem is to test static balance about the wheel.

就L60立式轴流风机轮毂与输出轴难于拆卸的问题和叶轮静平衡测试问题进行探讨，并提供用自制的简易龙门架和静平衡装置的方法进行检修的经验。

At a simple level, it is not difficult to write compilable Python programs based on templatized functionality; for this to be useful, of course, you would want a program to contain some customization that was determinable only at runtime.

在一个简单的水平，不难写compilable的Python程序的基础上templatized功能；这是有益的，当然，你想的计划包含了一些定制这是确定的只有在运行时。

It turns out to be very difficult to devise a theory to describe the universe all in one go.

要想一步登天地提出一种能描述整个宇宙的理论看起来是非常困难的。

With this approach, a mathematical model of ASVG is developed. The method is simple and can be used to analyze the detailed internal properties of an ASVG. It overcomes the disadvantages of the two methods generally used, one is a method for modeling an ASVG by getting differential equations according to the topology of the ASVG circuit, which is very complicated and it is difficult to get a unified model expression of an ASVG; the other is a method for modeling an ASVG by considering the whole ASVG as a voltage source, which is too simple to analyze the detailed internal properties of ASVG.

该方法既克服了根据ASVG装置拓扑结构列写微分方程组的建模方法过于复杂且不易获得统一模型表达式的缺点，同时又克服了将ASVG装置等效为电压源的建模方法太简单而无法用于分析ASVG装置内部性质的缺点，具有建模简单又能分析ASVG装置的内部性质的优点。

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％。