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In this paper, a thermal simulation model of a LED driver was established. The thermal field and thermal stress analysis of the driver was done by using the software EFD Pro 8.2, and the temperature rise from various parts and the temperature field distribution of the PCB were obtained. By analyzing the reasons leading to overheating and unideal heat distribution, corresponding thermal simulation using an improved model was carried out. Finally, the comparison and analysis of experimental measurement results and simulation results were given.

本文基于计算流体力学中的有限体积法，建立了该变换器的热仿真模型，利用EFD Pro 8.2软件，对驱动电源内部进行了热场及热应力分析，得到了各部分的温升情况和整个电源温度场的分布情况，分析导致PCB局部过热的原因，然后针对热仿真得出的不理想的热分布情况提出了改进的方法，进行了模型改进，对PCB板上的各部分进行合理的重新布局，并再次进行了热仿真，最终得到了较为理想的结果，最后给出了实验测量结果与仿真结果的对比及分析。

It is the best proof of the propriety of such a course — as well as of the continuity and uniform character of human progress — that we can trace everywhere, disguised under a variety of symbolical forms in the higher layers of civilization, the rude modes of life and forms of law with which the examination of the lower makes us familiar.

它是这样一种过程的适当性的最佳证据——对人类进步的持续性和特征统一同样如此——这过程我们可以在每一个地方追踪到它，它被掩藏在文明的较高各层次中种种象征形式之下，掩藏在我们由检查文明的较低各层次而熟悉的野蛮生活模式和法律形式之下。

Therelationship between solution rate of Al/TiC alloy in rotating Zn melting and thetemperature of Zn melting, rotating rate of axis and uniformization time wascalculated.

分析了各工艺参数对Al／TiC预制合金在锌液中溶解速度的影响，建立了Al／TiC合金在锌液中的溶解率与各参数间的关系式。

The source-specific risks were estimated by summing the products of individual air toxics concentrations in each source profile and its unit risk factor.

在风险评估部分，本研究利用来源分析的资料，以污染源中各物质的浓度乘上单位风险估计各污染源的致癌风险值。

Firstly, the basic idea of MFT is described. Next, the factors universe of discourse and their weights are determined. Finally,MFT is used for evaluating general performance of the communication networks.

文中首先描述了MFT的基本思想，然后确定了影响通信网不同性能级别的因素论域及各因素的分级表，再利用统计法算出各因素的权，最后采用MFT评估出通信网的综合性能指标。

The paper discusses on the unlikeness of economy globalization and culture globalization from the definition of the economy globalization and the characteristics of the culture,however,the law culture will be multiplied for the differences of nations on the background of the economy globalization.

本文从经济全球化的定义和文化的特性研究入手，论述了经济全球化并不等于文化的全球化，由于各民族、国家的特异性，势必会形成经济全球化背景下的法文化的多元化；同时，由于各民族、国家间的同一性，尤其是在经济全球化这个大背景下，又使各种不同的法文化的交流与相互吸收成为可能。

It would be wonderful to be intelligent : then one would be alive in all the parts mentioned and unmentionable.

有智慧，这是多么美好的事情！有了智慧，一个人全身的各部分——便或不便说出的各部分，都要活泼起来。

On one hand, each language develops harmoniously in this ecosystem. On the other hand, each language competes with each other. The changes of one or more languages will put the language cultural ecosystem in an unsteady state, and then causes the vicissitudes of language culture.

在这个系统中，各民族语言一方面相互协同发展；另一方面各民族语言也存在相互竞争，任何一个或几个民族语言的变化都会使语言文化生态系统处于不稳定状态，继而引起语言文化的变迁。

Because tourism products are intangible, perishable and untransferable and purchase behavior of tourists is flexible, tourism destinations and tourism enterprises have to convey all the information of destinations or scenic area to each tourist. Therefore, destinations and tourism enterprises consider commercials or ads in all kinds mass medias and tourism trade shows as the major means of promotion.

旅游产品的无形性、不可存储性、不可转移性及旅游者购买旅游产品的伸缩性使得各旅游目的地或旅游企业必须向消费者传递每一个旅游目的地或旅游景区的信息，这样以广告形式在各类媒体或旅游推广会上宣传自己就成了各旅游目的地或旅游企业的一个最重要的促销手段。

The results indicate that proper physical exercise can improve the function of the organs systems, including the other parts of brain and nervous system, and promote their upgrowth. Meanwhile, proper physical exercise can also develop the intelligence of the students.

研究结果表明，适量的体育锻炼可以促进机体各器官系统包括大脑和神经系统其他各部分的生长发育及其机能的改善，为开发青少年智力，搞好文化学习提供了重要的生物学基础。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失