三两个...

They had suppressed the cathodic process of carbon steel electrode. Their inhibition performance was also related with their molecule stereo conformation and electron configuration. Four of bis-(1, 1'-benzotriazoly)-α,β-diamide compounds linked via-CO 〓CO-chain were synthesized and certified by IR and 〓H-NMR. The minimum energy conformations of these compounds were obtained by MM2 forcefield program. The two benzotriazole moiety in BBT1 was more planar than in other compounds. This was beneficial in increasing the inhibition effects of BBT1. In 0.5M H〓SO〓 solution, BBT1 suppressed anodic corrosion reaction. In 3%NaCl solution, BBT1 suppressed both cathodic and anodic corrosion reactions. 1- [ (1'-imidazolly)-methyl] benzotriazole was synthesized by Mannich reaction.

合成了四个通过-CO〓CO-连接的双（1，1'-苯并三唑）-α，ω-二酰胺化合物，采用MM2分子力学程序优化了它们的分子结构，双（1，1'-苯并三唑）-α，ω-二酰胺化合物的缓蚀作用与其分子内两个苯并三唑单元的空间取向有关系，良好的平面性有利于苯并三唑二聚体的吸附和缓蚀作用，苯并三唑二聚体BBT1分子内两个苯并三唑单元近似平行，所以显示出较好的缓蚀效果。0.5M硫酸中BBT1主要抑制铜的阳极溶解的电化学反应；3％NaCl溶液中，BBT1对铜的阳极溶解和氧的阴极还原过程均有抑制作用，相比较而言对阴极过程的抑制作用更大一些。

The forward kinematics is analyzed by choosing one of the mechanisms which have one, two,three or zero angle constraint.Wherein,3-CCC is a new parallel mechanism which has three angle constraints and three distance constraints, Calay\'s formular and direction cosine matrix are used to describe the rotation matrix respectively.By setting Dixon\'s and Sylvester\'s resultant with the three angle constraint equations respectively and using parameters replacement to deal with the distance constraint equations,the 64 order input-output equation of the forward kinematics is obtained under both of the methods.Numerical example confirms these theretical results and the motion simulation is shown in VC++ by integrating OpenGL.

3对高小山提出的广义并联机构进行了研究，以其中具有角度约束的并联机构进行了分析，选取具有一个、两个、三个和零个角度约束类型中各一个机构进行了运动学正解求解，其中3-CCC是一种全部由圆柱副构成的具有三个线线角度和三个距离约束的新型并联机构，文中分别用Calay公式和方向余弦两种旋转矩阵建模方法对其位置正解进行了分析，通过对三个角度约束方程分别构造Dixon结式和Sylvester结式，以及对三个距离约束方程进行变量代换分别导出了位置正解输入输(来源：4040ABC论文网www.abclunwen.com)出方程，得出64组位置正解，并使用数值算例验证了其全部根。

Democrats , in general, are no great shakes at confronting terrorism.

我说我三个月攻克了英语，很多学习者是不相信的，以为这是商业炒作，我对此不表示任何看法，别人怎么做是别人的事，我只会做好自己，人们的眼睛是雪亮的，只要看完我写的全部博文，就知道我的水平了，我在当兵时见到李阳老师后，开始疯狂的自学几个月，每天只睡两个小时，结果患了很多疾病，于是就停止了学习，开始四处求医，直到05年，身体才有所好转，于是到大连外国语学院读了自考，这一年也没有怎么学，花了两万多块，结果我上了半年课都不到，因为我退学了，因为课程表中没有外教的课程，实在太枯燥了，我就退学了，怕父母伤心，我就躲在宿舍里近半年多，那是迷上了韩国服饰，因为大连和韩国直接进行贸易交流，很多服装都是原版引进，我实在很动心，我想如果回家开个韩国服装店，一定很火，于是，就彻底弃学从商了，可是由于没有经验，做了几年买卖，一直亏损，07年开了个疯狂英语口语班，用我在部队学习过和背过的疯狂英语口语，传授了一些小学生，还有一些高中生，那时只能传授点日常口语，因为我对语法一窍不通，可是后来，连一个月30元都招收不到新学员了，因为我的能力实在太差了，口语能力皮毛，语法一窍不通，而我的家乡又是个特别重视考试成绩的，所以，我只有开始深造了，直到08年，才重新捡起英语，重新开始自学，因为我发现，只有依靠头脑赚钱，可以无本取利，于是我把在大连买过的英语资料，重新拿出来，开始研究并实践了三个月，终于悟出了三多英语，我说我三个月攻克了英语，是从08年我正式开始自学算起的，而不是从我认识李阳老师开始的，如果从那时算的话，加在一起也就一年的时间吧。

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The natural enemies group, neutral arthropod group and phytophagy arthropod group of the two sub-systems were respectively analyzed and have found that all types of arthropods of the two sub-systems can be divided into three different types of groups. The first group is which living in two habitats and the species current is few impacted by the changes of habitats; The second group is which can living in two habitats in turn ,but can transfer to another in the time the habitats was deeply disturbed ;The third one can only living in one habitats and can make the another habitats as a temporary habitats.

两个亚系统的天敌类群、中性节肢动物类群、植食性节肢动物类群分别进行分析发现两个亚系统的各类群节肢动物均可划分为三种不同类型，第一种为栖居于两种生境且物种流受生境变化影响较小类群；第二种为可依次栖居于两个不同生境，生境的变化对其物种流产生较大影响；第三种为栖居于某一单一生境，但可将另一系统作为某一虫态的临时栖境。

We can compute three dimensionalvelocity distribution on a planar domain of flow field based on conventional ParticleImage Velocimetryand 3D reconstruction theory of stereophotogrammetry.

在流场空间两个不完全交叠的体积元(映射为两个摄影机象平面上以同名点为中心的两个相同大小的判读小区域)中的示踪粒子的统计性质都能同样表征这两个体积元公共中心的流体运动的假设下，PIV技术与体视三维重建理论的结合，可以将原PIV技术中二维统计平均的概念扩展为三维统计平均，并且在确定体积元公共中心位置之后，直接实现空间流体体元的三维位移重建。

In crystal, two APC-PY trimers associate into a hexamer by face. The assembly of two trimers within this hexamer is very similar to that of C-phycocyanin and R-phycoerythrin hexamers, but the tight level of the assembly of two trimers within this hexamer is clearly not so much as that of C-PC and R-PE hexamers.

晶体结构中，两个APC-PY的〓三聚体通过面对面的方式缔合成一个〓六聚体，该六聚体内两个三聚体的组装方式十分类似于C-藻兰和R-藻红六聚体，但六聚体内两个三聚体组装的紧密程度上显然不如C-藻兰和R-藻红六聚体。

After the approach always look two or three turns ahead if you are on the steeps, two or three bumps ahead if you are in a mogul field, or two or three trees ahead if you are on a glade run.

该方法后，总是看两三个轮流提前如果您在五香，八角，两个或三个提前碰撞，如果你在一个领域的巨头，或两三个树，如果你前面的空地上运行的。

In 1940, a French infantry division was made up of three infantry regiments (each one having a headquarters company, a weapons company and three battalions), one cavalry unit tasked with reconnaissance, one anti-tank company (12 25mm anti-tank guns), one light field artillery regiment with three groups of 12 75mm guns each (plus an anti-tank and anti-aircraft company to protect the field guns from enemy tanks and aircraft), one heavy field artillery regiment (two groups of 12 155mm howitzers each), two engineer companies, two signals companies, two transport companies, one ammunition company, one medical group and divisional services.

在1940年，一个法军步兵师由三个步兵团(每个都有一个司令部，一个武器连和三个营)，一个负责侦察的骑兵部队，一个反坦克连(12架25mm反坦克炮)，一个轻型野战炮团配备有12架75mm炮三组(再加上一个反坦克防空连保护野战炮不受敌人坦克和飞机的攻击)，一个重型野战炮团(12架155mm榴弹炮两组)，两个工兵连，两个通信连，两个运输连，一个军火连，一个医疗大队和师后勤部门。

The agile Frenchman was soon upon his feet again, and lost no time in knocking down two of his long-gowned adversaries with his fists and a vigorous application of his toes; then, rushing out of the pagoda as fast as his legs could carry him, he soon escaped the third priest by mingling with the crowd in the streets.

这个又结实又灵活的法国小伙子豁地翻过身来，左一拳，右一脚，三个敌手就被他打翻了两个，趁这两个僧侣被长道袍绊住不能动弹的时候，他拔腿就跑，三脚两步冲出了庙门，转眼之间，已经把那个跟踪追来的第三个僧侣和他带的一大帮人撇在老远老远的后边了。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。