正确地

In this thesis, I summarize the theoretical calculation method, applied scope and notice of siphonic drainage system, and point out the advantage of siphonic drainage system compared with gravitation drainage system. In the archetype experiment study of siphonic drainage tube, I adopt different tube diameter and different structural height to survey the drainage volume and press in different place. I observe various kinds of flow state, and get chief factors which influence hydraulic peculiarity of system as the tube diameter or structural height, and find out the relevance of factor to flux. I apply CFD Fluent software and adopt standard k-ε model and RNG k-ε model, then use finite volume method and second-order upwind scheme to discrete numerical model, while coupling numeration of velocity field and press is based on SIMPLE. In the numerical simulation of curved part of tube, siphonic drainage tube experiment system and multi-outlet siphonic drainage system, I make research on internal velocity and press of system in different project condition by changing the tube diameter of curved part, negative press value in tube export and improving the quantity of water gutter. This thesis first adopts a method of combining archetype experiment and numerical simulation to study the siphonic drainage system, test and verify the validity of experiment and numerical simulation, and makefurther study on system, it solves the problems of limited testing conditions, and has a logical results, it can provide a valid method for optimizing and designing the drainage tube-net system. The conclusion have referring value for study and design of siphonic drainage system.

本文首先对虹吸式排水系统理论计算方法、适用范围以及注意事项做出总结，并分析了虹吸式排水系统的优势；再对虹吸式排水管道进行原型试验研究，采用不同管径不同立管高度，对系统流量、管道压强进行量测，观察了各种工况下的流态，对其水力特性进行研究分析，找出影响水力特性的落差、管径主要因素以及与排水量的关系；进一步应用计算流体力学Fluent软件，采用标准κ-ε模型与RNGκ-ε模型，计算过程应用有限体积法和二阶迎风格式对数值模型进行离散，速度和压力的耦合采用SIMPLE算法，分别对系统弯管段、虹吸排水管道试验系统、多斗虹吸式排水系统进行数值模拟分析，通过改变管段弯头处半径、管段出口负压值、增加雨水斗数对不同工况下系统内部的速度和压力进行研究；本文首次采用结合原型试验与数值模拟相结合的方法，对虹吸式屋面雨水排水系统进行研究，试验与模拟相互验证，并进行拓展，很好地解决了虹吸式屋面雨水排水系统由于试验条件限制问题，结果正确合理，为排水管网系统设计和优化研究提供了有效的方法，对工程设计有较好的参考价值。

So when we ask, what is right education, is it not, not only academically, to have a good brain, to know the world in which we live, the whole technological development, learn all about it skilfully so that he can have a good job and so on.

所以当我们问什么是正确的教育，难道不是，不仅在学业上有个好头脑，知道我们身处的这个世界，整个技术的发展，技巧熟练地掌握所有这些，从而他能有个好工作，等等。

With the science and technology developing,more and more people can use computer skillfully.

随着科技的发展，越来越多的人能够熟练地使用电脑。所以D为正确答案。

According to the characteristic of CNC plasma cutting machine it could improve the process quality of cutting piece in effect for choosing proper technics, for example, cutting section point, aspect, sequence, speed etal during the period of processing, and elaborating towards the distortion control of single side piece, slightness piece, profiled piece and particularity piece at the same time.

根据数控等离子切割机的特点，在加工过程中正确选择切割的起点、切割方向、切割顺序、切割速度等工艺，可以有效提高切割件的加工质量，同时对单边工件、细长件、异型件以及特殊件的变形控制进行了详细地阐述。

Unlike cold-processed soap, hot-processed soap can be used right away because lye and fat saponify more quickly at the higher temperatures used in hot-process soapmaking.

不同于冷战加工肥皂，热加工肥皂可用于正确的选择，因为脂肪saponify碱液和更迅速地在较高温度下使用的热过程soapmaking 。

OUn1V0v0 Unlike cold-processed soap, hot-processed soap can be used right away because lye and fat saponify more quickly at the higher temperatures used in hot-process soapmaking.

不同于冷战加工肥皂，热加工肥皂可用于正确的选择，因为脂肪saponify碱液和更迅速地在较高温度下使用的热过程soapmaking 。

P \u0 Unlike cold-processed soap, hot-processed soap can be used right away because lye and fat saponify more quickly at the higher temperatures used in hot-process soapmaking.

不同于冷战加工肥皂，热加工肥皂可用于正确的选择，因为脂肪saponify碱液和更迅速地在较高温度下使用的热过程soapmaking 。

C5d2\3~,kdL0 Unlike cold-processed soap, hot-processed soap can be used right away because lye and fat saponify more quickly at the higher temperatures used in hot-process soapmaking.

不同于冷战加工肥皂，热加工肥皂可用于正确的选择，因为脂肪saponify碱液和更迅速地在较高温度下使用的热过程soapmaking 。

To understand the university function of social service is the premise for universities to serve for society better.

正确理解大学的社会服务职能是大学更好地为社会服务的前提。

People should have a correct on audit risk, to strengthen the souse of audit risk and prevent from and control it actively and effectively, making audit carry out its function in maintaining the market economy order..

为此，人们应正确认识审计风险，增强审计风险意识，积极有效地预防和控制审计风险，使审计在维护市场经济秩序方面起到应有的作用。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷