桥的

This thesis is mainly about the research on the synthesis, structures and reactivity of di-or tri-metal bridging carbene and bridging carbyne complexes

过渡金属桥卡宾和桥卡拜络合物本身即为简单的金属原子簇化合物或是合成金属原子簇化合物的重要前体，在有机合成和烯炔烃的聚合和异构化等催化反应中有广阔的应用前景以及在某些过渡金属参与的反应的机理研究中具有重要的研究价值。

This thesis consists of three main parts of the research work on the syntheses, structures and reactivities of the olefin-coordinated transition metal carbene and carbyne complexes. In chapter 1, on the basis of our previous research works on the reacitivites of the cationic carbyne complexes of transition metals with metalcarbonyl anions, we explored the reactions of the cationic carbyne complexes of manganese (1) and rhenium (2) with polymetalcarbonyl anions, and developed a new method for the preparations of heternuclear trimetal bridging carbyne complexes.

本论文对烯烃配位的过渡金属卡宾和卡拜络合物的合成、结构和反应性能进行了研究，主要进行了如下三方面的工作：第一章在本小组过去的研究基础上，进一步考察锰和铼的阳离子卡拜络合物1和2与羰基金属阴离子化合物的反应，用来合成异核多金属桥卡拜络合物，发展合成多金属桥卡拜络合物的新方法和新路线。

It is showed in wind-vehicle-bridge system vibration analysis that cross wind action can remarkably increase the response of bridge and vehicle. Generally, the response of bridge and vehicle are increased with wind speed and train speed, one case that vehicle is on leeward side of deck is more unsafe than another case that vehicle is on windward side of deck. Nonlinear factors can more influence bridge than vehicle.

风—车—桥系统耦合振动分析结果表明：考虑风的作用会显著增加车辆和桥梁的响应；车辆和桥梁的响应总体上随风速和车速的提高而变大；车辆位于桥道背风侧时较迎风侧时更为不利；非线性因素对桥梁的影响较车辆的要大。

It is the real world of salt in which the roads are paved with salt, houses are built with salt,,salt mountains extend beyond the horizon and the salt sea looks just boundless…It was even incredible for us to see that scores –of-kilometer-long salt bridge called the Extended Salt Bridge floating on the brine hillof the Salt Lake.

这里真是盐的世界，盐铺成的路，盐盖成的房子，起伏不断的盐山，一望无际的盐海。。。。。。更难以置信的是湖上还有一座浮在卤水山的盐桥，长达几十公里，被人们称为"万丈盐桥"！

The ZCS condition for lagging switches under wide load range is provided by a secondary auxiliary circuit, and an unbalanced-voltage-division flaw which inheres in ZVS half-bridges in series hybrid DC-DC converter is overcome in the proposed converter, consequently the converter is more practical.

利用副边的辅助电路在宽负载范围内实现了滞后管的零电流软开关，并克服了以前出现的ZVS半桥串联混合式直流变换器所存在的2个半桥分压不均衡的固有缺点，从而使该类拓扑更加实用。

The idea that the casing shoe resistance and the crushing strength of the LCM must be considered when design the density of the drilling fluids is presented. It holds that the surface pressure should be junior to the crushing strength of LCM, in order to prevent the formed bridge plug from crushing.

提出设计井内堵漏钻井液密度时，必须同时考虑套鞋处破漏压力和桥接材料的抗压强度对井内压力的限制；认为提高压力敏感性裂缝地层承压能力的堵漏作业时，井口压力应不超过桥接材料的抗压强度，以保证裂缝内已形成的堵塞隔墙不被破坏。

Other desmosomal proteins showed variable changes, but signal levels for the nondesmosomal adhesion molecule N-cadherin were normal in all subjects with ARVC.

其它的桥粒蛋白变化多样，但是在所有致心律失常右室心肌病患者的标本中，非桥粒连接分子的N-钙粘蛋白的信号水平都是正常的。

The effect of particular saturated bridge during the course of ET and HT in rigid, covalently linked donor-bridge-acceptor dyads has captured the attention of scientists'in this field.

饱和桥在双生色团的给体-桥-受体体系的分子内电子转移和空穴转移过程中的作用一直是此领域的科学家们关注的焦点。

This was the bridge in the Harry Potter movie - St. John's College Bridge of Sighs built in 1831. The bars were to prevent students entering at night rather than to prevent escape.

出现过在哈利波特电影里建於1831年的圣约翰学院的叹息桥~桥上的窗栏当年是防止半夜偷溜进入的学生，而不是防止想逃的学生。

The notorious Bridge of Sighs, so-called from the voices of prisoners being taken across it to their deaths in the old days, may represent the sound of modern Venice more than the triumphal cries of this once-glorious Queen of the Adriatic

臭名昭彰的叹息桥是过去死刑犯被押赴刑场跨过此桥时发出的叹息声，故名，它比曾经光荣一时的亚得里亚海之女王的胜利呼声似乎更能代表现代威尼斯的声音。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。