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For the synthesis of NHC precursors, there are also several routes: condensation of glyoxal, amines and paraformaldehyde; alkylation of imidazole or monosubstituted imidazole with alkyl halide; annulation of ortho esters and 1,2-diamines; ring closure of hydrazines or amides with acetic anhydride; reduction of thiones with Na/K in THF.

关于N-杂环卡宾前体的合成途径主要有：乙二醛、伯胺和多聚甲醛的缩合反应；卤代烷与咪唑及其取代咪唑的烷基化反应；原甲酸酯与1，2-二胺的成环反应；肼或酰胺与酸酐的环化反应；用Na/K对环硫脲化合物的还原反应。

Guangzhou to the rest of the world and expand the three routes: one can reach the north shore of Java, is a Mediterranean Apennine peninsula, and then opened up a channel east coast of Africa.

广州至世界各地又拓展了三条航线：一条可到达爪哇北岸；一条是地中海亚平宁半岛，后又开辟了一条非洲东岸航道。

Furthermore, two synthesising routes are compared and the research of catalytic aromatization of isophorone is summarized in this paper.

本文对两种工艺路线进行了比较，论述了异佛尔酮催化芳构化的研究进展。

I have always been attracted to trying less-obvious routes; temperamentally, an artist's life should not be institutionalised, either in the way it was at the Menuhin School, or later when I worked for the BBC.

我一直对尝试未知的道路很有兴趣，从气质上来说，一个艺术家的生活不应该是制度化的，无论是在梅纽因学校还是在后来我工作的BBC。

One of these routes turns southeast along the Amu Darya including Bukhara and Samarkand the center of Silk Road trade to the Aral Sea, through ancient civilizations under the present site of Astrakhan, and on to the Crimean peninsula.

其中一条路线是沿着阿姆河转向东南方，包括布哈拉和撒马尔罕。

Sol-gel Autoignition Synthesis, simple, self-cleaning and easy to undertake scale production, is the one of the prospective routes for manufacturing barium titanate powders.BaTiO3 nanopowders with the particle size 20-90nm, specific surface area 15m2/g, fine particle distribution, ratio of Ba/Ti 1.002 and with the dielectric constant more than 3000, were synthesized by SAS BaTiO3-TiCl4-ammonia-citric acid system.

本文自己组装的溶胶凝胶自燃合成系统，利用对Ba(NO_3)_2-TiCl_4-柠檬酸-氨水体系进行自燃合成研究，制备了具有纳米尺度的近球形BaTiO_3颗粒，粒径介于20-90nm之间，比表面积15m~2／g，分布范围较窄，Ba／Ti为1.002，器件介电常数最高达3000多。

In the system of benefit analysis and optimized auxiliary decision-making on the operation of passenger trains, the visual optimized design of passenger train operation routes could be realized by E-map technical integration.

在旅客列车开行效益分析与优化辅助决策系统中，通过电子地图技术集成实现旅客列车开行路径的可视化优化设计。

On many routes, another backpacker will be by every hour.

在许多路线，另一个背包将每隔一小时。

The Opium of the Intellectuals provides a kind of Baedeker of the higher gullibility that Orwell disparaged, analyzing its attractions, describing its costs, mapping its chief roadways and pointing out some escape routes.

知识分子的鸦片》为解释奥威尔所贬损的那种现象，知识分子更易被观念蒙骗，提供了指南，阿隆分析了这种现象的原因，它的恶果，描绘了它的路线图，并指明了可能的逃离的出口。

To further improve the accessibility to the city, especially for the working population, Cyberview has initiated the Cyberjaya Dedicated Transportation System, with routes running to important hubs within the Klang Valley, Banting, Klang and Seremban.

为了进一步改善，尤其是工作人口向城市的无障碍，Cyberview发起的赛城专用交通系统，与运行在巴生谷，万津，巴生及芙蓉重要的枢纽航线。

We had to work within the parameters which have been established.

我们只能在规定的范围内工作。

Tempe is a community that presents great options for home owners.

丹贝这是一个社会，有很大的选择业主。