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We also discussed this unusual reaction process and proposed a reasonable "one method,two paths" mechanism.These novel iodine-mediated oxidative cycloadditions provide a rapid and efficient route to the preparation of a variety of spiro dihydrofuran and cyclopropane derivatives.

该反应不使用昂贵的催化剂；反应过程中不使用有毒有害的有机溶剂，对环境友好；反应时间短，收率高；在相同条件下得到不同结构的产物，这提供了一种新型的合成二氢呋喃和环丙烷结构的环化反应。

The calculation results are discussed and summarized, which shows that the FEM 3-D model of the cylinder block is reasonable and practicable.

对计算结果作了分析阐述，计算结果表明气缸的三维有限元模型在整体上是合理可行的。

How to set up a reasonable tightening process for cylinder head bolt is expounded.

阐述了如何合理地制定缸盖螺栓的拧紧工艺。

To study the taxiing-induced dynamic response of the aircraft with multiple wheels and multiple landing gears due to runway unevenness, base on several reasonable and necessary assumptions, the mathematical model of aircraft in taxiing is established using the d'alembert's principle. It can simulate taxiing inpact properties accurately, it considers in detail the vertical and horizontal motion and pitching about its center of gravity and the significant symmetric elastic modes.

在一些必要合理的假设下，利用达朗贝尔原理，建立了多轮多支柱式及小车式起落架飞机地面滑跑动态响应分析的全机模型，考虑全机沉浮、机体弹性和定常气动力的影响，起落架支柱的弹性变形，小车式起落架的车架的俯仰运动以及弹性变形，对等速滑跑飞机建立了全机运动的微分方程，并以旧金山28-R跑道为地面输入，利用时域积分的方法得到飞机滑跑的各种响应。

Reasonable composition of the pictures, daintily production process, Special material mosaic, natural wrinkle fabric paint, subtle and elegant colors.

合理的画面布局、讲究的工艺制作、特殊材料的镶嵌、自然的皱漆肌理、含蓄典雅的色彩，打磨后的有规律和无规律的画面效果。

First we have to admit, English is one of the most beautiful languages in the world, the peacetime wants the place of the place,reasonable of notice her daintiness at the time of studying English much,vivid of place, can't always stare at she lets you feel pout of place, you feel not the place that comprehend.

首先我们必须承认，英语是世界上最优美的语言之一，平时在学习英语的时候要多注意她的优美之处、合理之处、生动之处，不能总盯着她让你觉得别扭的地方，你觉得不好理解的地方。

Dairy farming and the environment, keeping a reasonable and, after milking the storage, management, the impact of raw milk is an important factor in quality.

而奶牛的养殖环境，合理的饲养以及对挤奶后的贮存、管理都是影响原料乳质量的重要因素。

Firstly, this paper researched the mechanism of tubing string vibration when natural gas flows in horizontal well tubing string. Secondly, established whole tubing string undamped and damped vibration system model according as reasonable assumption data of one horizontal well. Apply finite element analysis software to calculate tubing string natural characters, simple harmonic dynamic behavior of stable gas production and nonlinear dynamic behavior. Finally, this paper carried out the safety varied frequency of gas well and the method of vibration reduction.

本文首先从理论和数值模拟研究了天然气在水平井油管柱内的流动诱发油管柱振动的机理，然后在合理假设的基础上结合某水平井数据建立了全井段油管柱无阻尼和有阻尼振动系统模型，利用有限元软件计算分析了油管柱固有特性、稳产简谐动力学响应和非线性动力学响应，针对油管柱振动规律提出了天然气安全调节频率范围和减振措施。

The required standard of conduct is that of the reasonable person in the circumstances, and depends, in particular, on the nature and value of the protected interest involved, the dangerousness of the activity, the expertise to be expected of a person carrying it on, the foreseeability of the damage, the relationship of proximity or special reliance between those involved, as well as the availability and the costs of precautionary or alternative methods.

被要求的行为标准是指合理人在其所处状况下所应遵守的标准。它特别取决于受保护利益的性质和价值，行为的危险性，行为人被期待的专业知识，损害的可预见性，关系人之间的亲近关系或特殊的依赖关系以及预防措施或者其他替代方法的可获得性及费用。

But there is weighty authority for the belief that, however this may be,"not the nature of the crime, but the dangerousness of the criminal, constitutes the only reasonable legal criterion to guide the inevitable social reaction against the criminal."

但不论如何，下列观点具有重要权威的支持："罪犯的危险性而非犯罪的性质，构成了唯一合理的法律标准以指导针对罪犯的不可避免的社会反应。"

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。