主要问题

Based on large quantity of investigation and study of bridges in small town and comprehensive collection of existing research documents in and beyond the country, the fundamental statement of bridges in small town is generalized in this paper. At the same time, the present main problems of bridges in small town are pointed out. According to the characteristic of small town, the factors such as regional differences, economy, function, safety, landscape and environmental protection that affect the selection of bridge type in small town are analyzed. Based on those factors, the adaptable bridges, the types of bridge pier and abutment as well as common types of affiliated facilities for small town are put forward.

通过大量的小城镇桥梁调查研究，并在广泛收集国内外已有研究资料的基础上，总结出小城镇桥梁的基本现状，指出了小城镇桥梁目前存在的主要问题；根据小城镇的特点，分析了地域区别、经济、功能、安全、景观和环保等因素对小城镇桥梁桥型选择的影响；基于小城镇桥梁现状和桥型选择的影响因素，提出了小城镇适应性桥型和墩台结构类型以及附属构造常用型式。

The its existence's subject matter one is pretreats system's efficiency not to be high, the flow is long, the effect is unstable; Second, the ion exchange resin needs the acid and alkali regeneration, discharges the acid and alkali waste water massively, the pollution of the environment.

其存在的主要问题一是预处理系统的效率不高，流程长，效果不稳定；二是离子交换树脂需酸碱再生，大量排放酸碱废水，污染环境。

That is from the space characteristic, person's machine engineering of the behavior characteristic, square of square people learn chair facilities at different angle, discuss chair facilities in the square of layout and the design characteristics of the chair facilities, analyze an existing square key problem with existent chair, put forward in future to design in should further improvement design, from make people the center of set out highly, emphasize consideration the environment attribute of the furniture product, make city square of chair facilities the form diversify, will integrate a square design to the concern of the person of each aspect, design is filled with human interest of in the city square chair.

本文提出了城市广场中座椅设施可持续性设计的思想，从广场上人们的行为特性、广场的空间特质、人机工程学在座椅设施中的应用等不同角度，论述了座椅设施在广场中的布局及座椅设施本身的设计特点，分析了现有广场座椅存在的主要问题，提出在未来设计中应进一步改进设计，从以人为本的高度出发，着重考虑家具产品环境属性，使城市广场的座椅设施形式多样化，将对人的关怀融入广场设计的每个方面，设计出充满人情味的城市广场座椅。

To improve the design and analysis of axial-flow pumps, the Computer Aided Design system and the basic methods of flow field simulation and performance prediction base on the Computational Fluid Dynamics are developed in the paper.

本文针对目前轴流泵设计和分析过程中存在的主要问题，建立了完整的计算机辅助设计系统，并通过计算流体动力学手段，建立了分析和预测轴流泵内部流场及外特性的基本方法。

The main problem facing Christiaan Barnard was how to prevent the body's rejection of the new heart.

现在，克里斯蒂安·巴纳德所面临的主要问题是，如何防止人体对新心脏的排斥。

This paper gives a brief introduction of research work on the fabrication measurement of rotation accuracy of machine tool main spindles. The following problems have been studied, stability of a new type base circle generator, mechanical method of eliminating eccentricities, precision fast eccentricity-regulating equipment, program of autosof tware for checking delaytime number for improving sampling accuracy and its au...

本文通过试验研究，讨论机床主轴回转精度工业测试的一些主要问题：新型基圆发生器的稳定性；机械消偏法及快速高精度调偏心装置；提高采样精度的自动软件检测延时数程序及自动定标技术；干扰的产生原因及消除方法；主铀的工业测试规范。

In this paper, Frequent fault diagnosis of the reducer are generalized through a great deal fault-cases of reducer were collected, and the fault mechanism and the vibration characteristics of the pivotal parts of gear and bearing are introduced in detail.

本文首先通过对减速机故障的大量调查及信息搜集，对减速机故障诊断中出现的主要问题进行了详尽的分析，特别对减速机易出现故障的关键部件轴承和齿轮的诊断机理进行了研究。

The article highlighted furnace cold dynamical test, the steady pressure pipe blowing ,.

重点介绍了锅炉冷态动力场试验、蒸汽稳压吹管、制粉系统调试、燃烧特性等试运的情况，以及设备存在的主要问题和改进建议。

The title of my paper is the flame detecting system of Furnace Safeguard Supervisory System..The operation safety of the large scale boiler using coal or gas as the fuel is highly depending on the reliability and stability detections of the burning flame in the boiler.First,the paper summarizes the research background and the current situations on the flame detection system of FSSS in China and abroad, analyzes its future trend of market and technology,and then puts forward my research goals and expected results.and resolved problem.

大型燃煤燃气锅炉的安全运行在很大程度上依赖于锅炉炉膛火焰燃烧的稳定性和可靠性检测，论文首先综述了锅炉炉膛安全保护系统(Furnace Safeguard Supervisory System，以下简称FSSS)中火焰检测系统的国内外研究现状，分析了火焰检测系统的国内市场前景，提出了本课题的研究目标和需要解决的主要问题。

The troubles of boiler tube leak have become the key problem on the machine safe stable movement in our country.

锅炉炉管泄漏事故已成为影响我国设备安全稳定运行的主要问题。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！