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In the early 1960s Professor W. T. Beale of Ohio University invented a free-piston version of the Stirling engine in order to overcome the difficulty of lubricating the crank mechanism.

在20世纪60年代初野生比尔教授的俄亥俄州立大学发明了一种自由活塞版本的斯特林发动机，以便克服困难，润滑曲柄机制。

He neglected the visions, for the sake of the honour and gain, but finally was scourged all night by the holy angels, so that in the morning with haste and tears he betook himself in sackcloth and ashes to Pope Zephyrinus and cast himself at the feet of the clergy, and even of the laity, showing the weals of the blows, and was after some difficulty restored to communion.

他忽略了的理想，为了荣誉和利益，但最终是scourged晚上所有的神圣的天使，所以，在今天匆忙和眼泪，他本人betook在麻布和骨灰，教皇Zephyrinus及演员在自己脚下神职人员，甚至的俗人，显示weals的打击，并在一定程度上难以恢复到共融。

At first, the government had great difficulty in persuading people to leave Rio and to settle in Brasilia.

开始，政府劝说人们离开里约热内卢到巴西利亚落户是十分困难的。

Locus: Zhoucunqu myself have light of the five water chestnut (8 riggers band air conditioning) a hiring, the vehicle condition am good, the warm braw is good, vehicle inside and outside clean, is suitable goes on a journey riding instead of walking in you, the wet weather, the snowing day, drive time Duan Dache when the difficulty looks for me, long-distance local all may,1, unit, individual long and short term uses the vehicle; 2nd, traveling chartered car; 3rd, the airport, the station send and pick up; 4th, the coming and going to work chartered car commuting, sends and picks up the student; 5th, goes for a walk in the countryside at the qingming festival sweeps the graves; Urgently needs and so on other to use the vehicle temporarily.

本人有五菱之光（8座带空调一台出租，车况好，暖风好，车内外干净，适用于您出行代步，下雨天，下雪天，上下班时间段打车困难时找我，长途市内皆可，【1、单位、个人长短期用车； 2、旅游包车； 3、机场、车站接送； 4、上下班包车通勤、接送学生； 5、踏青扫墓；临时急用等其他用车。

Financing source basically has: Bureau of tax of Heibei province land allocates funds 400 thousand yuan, the fund of the compensation that tear open change of the county 300 thousand yuan, more than classics to " city bureau, province bureau chases class to hit allowance of capital construction difficulty to report ", up to in November 2008, bureau of prefectural land tax gets 300 thousand yuan of ranking allowance in all.

资金来源主要有：河北省地税局拨款40万元，县里的拆迁补偿款30万元，余款经向"市局、省局逐级打基建困难补助报告"，截至2008年11月，县地税局共得到上级补助的30万元。

The membrane isolation pumps is one kind of hydromass transportation hydraulic system,can reduce the cartage expense greatly,but indirectly brings the huge social efficiency,safe reliable,the work rate is high,may not stop nearly carries on the whole year to transport,does not have the material to lose nearly,the easy automatic control,to be advantageous for the maintenance management The hydraulic pressure diaphragm pump is one kind of fill domestic diaphragm pump which we develops in high-pressured,the small curr ent capacity pulp transportation aspect blank pumps plants,it and the common diaphragm pump main difference is:Has substituted for the crank connecting rod,the reduction gear using the hydraulic pump and so on aseries of equipments direct drive piston motion,this causes its structure is greatly the simplification,the cost drops greatly;When at the same time also requests the piston the commutation confidential assurance extremely accurately,but must realize this point theoretically and all has the very great difficulty in fact.

膜隔离泵就是一种浆体输送的液压系统，能大大降低运输费用，可间接带来巨大的社会效益，安全可靠，作业率高，几乎可不停地进行全年输送，几乎没有物料损耗，易于自动控制，便于维护管理。液压隔膜泵是我们开发的一种填补国内隔膜泵在高压、小流量矿浆输送方面空白的泵种，它与一般的主要区别是：利用液压泵取代了曲柄连杆、减速器等一系列装置直接驱动活塞运动，这使其结构大为简化，成本大大下降；但同时也要求活塞的换向时机要把握得非常准确，而要实现这一点理论上和实际上都存在很大难度。

Then the boundary element integral equation of interior and exterior form is deduced in detail, also the form with corner coefficient. The significance for numerical calculation and principle of the singular integral is analyzed, and a non-isoparametric transformation method is presented to calculate weak singular integral and Cauchy integral, the method presented provides us a very simple way to computer the two kinds of singular integral of Helmholtz boundary integral equation, and it is easy to program in computer. After the difficulty of the calculation for multi-frequency of Helmholtz boundary element is explained, a method named SECHIEF (Series Expansion Combined Helmholtz Integral Equation Formulation), which is focused on the computational efficiency, is presented.

对结构声辐射的边界积分方程的内部形式与外部形式进行了详细的推导，给出了角点系数的计算方法与边界积分方程的形式，在此基础上，分析了奇异积分产生的原理及其对数值计算的重要性，提出了一种计算奇异积分的非等参(来源：Ae8a8BC论文网www.abclunwen.com)单元的变换方法，该方法给Helmholtz 声学边界积分方程中的弱奇异积分与Cauchy 奇异积分的计算以及编程提供了极大便利。

The Causal Relation Data Mining is a new direction in the Data Mining research field,and it is very useful in the application.The Difficulty of modeling blocks its development.

因果关系挖掘是数据挖掘领域一个新的研究方向，具有很大的实用意义，但理论建模的困难阻碍了它的发展。20世纪90年代，在因果建模研究成果的基础上，国外开始针对此方向进行研究，目前已得到了一些理论算法。

On the current importance of his equipment, Riquelme emphasized the difficulty of a rival as the Celt of Vigo from which it hopes that it complicates the things in The Madrigal, in the meeting league of next Sunday.

说到他所在的球队的现状，里克尔梅觉得在下周日在El Madrigal联赛的对手Celta de Vigo 可能会使情况变得复杂一点。

By mechanical test of the steel strip and simulation of strip deformation in tension leveling using finite element method,characteristic features of the strip were obtained,such as;high yield stress,high yield ratio and low plastic elongation as the basic reason of difficulty in tension leveling and shape control.

通过对全硬钢的力学性能的测定和拉矫变形行为的有限元仿真，发现屈服应力大、屈强比高以及断裂时塑性延伸小等特性是造成镀锌后全硬带钢拉矫困难和板形难以控制的根本原因。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。