查询词典 hindered

The electron-rich and sterically hindered ligand 9d provides the best enantioselectivities (up to 97.8 % ee) for various chalcones as the substrates.

其中富电子且空间位阻较大的配体gd对查耳酮类底物表现了最好的手性诱导能力，加成产物的ee值达到94.7一97.8%。

The facts indicate that apart from the asymmetric induction of chiral diamine backbone,sterically hindered substitute groups on the aromatic rings,and the presence of sp~3-hydridized amino donors and its N,N\'-disubstituted groups in chiral SalanCrX complexes all play important roles in controlling polymer stereochemistry and enantioselectivity.

研究发现除了手性二胺骨架的不对称诱导作用，苯环上的大位阻取代基、N，N\'-二取代基的位阻作用以及N原子上sp~3杂化的供电子效应都对调控聚合物的区域和对映体选择性有很大作用。

Second , the developed socialist economic cooperation on the basis of" Gengzheweijitian", subversed the traditional system of private land , by the established people's commune system by Cooperative and agricultural collectivization movement completely, The relationship between ownership of agricultural land had become disordered and unclear, hindered the development of agricultural production.

在&耕者有其田&的基础上发展的社会主义合作经济，通过农业合作化和集体化运动所建立的人民公社体制彻底颠覆了传统的私有土地制度，农地产权关系变得紊乱不清，阻碍了农业生产的发展。

The combination effect of hindered amine light stabilizers PDS copolymer of 2,2,6,6 tetramethyl 4 piperidinyl methacrylate(TMPM with styrene with several kinds of antioxidant in polypropylene under γ irradiation was studied in this article.

研究了受阻胺光稳定剂 PDS4-(甲基丙烯酸- 2 ，2 ，6 ，6 -四甲基哌啶醇酯和苯乙烯的共聚物与几种类型抗氧剂在γ-辐射下在聚丙烯中的并用效应。

The road tolling system and relative theory in China came into being under the special condition that the road infrastructure hindered the economy seriously.

我国的公路收费制度和相关理论是在公路基础设施严重束缚了经济发展的特殊历史背景下产生的。

In the course of this rise and fall,the royal rorce occupied a political dominantposition for a long time and carried out a series of liberal political,economic andsocial reform unconstrainedly,so that the development of the two industrial classes wasgreatly limited and the realization of the political democracy was always hindered.Furthermore,this kind of tendency has been strengthened by the German obedient nature.

在这一起伏跌宕的过程中，王朝势力长期控制着政治统治地位，并主动实行了有限的自由主义改革，颁布了一系列社会保障措施，两大产业阶级的发展由此受到极大限制，政治民主也迟迟不能真正实现，德意志民族根深蒂固的服从意识则强化了这一趋势。

The credit crisis has already hampered economy of our country's progress and has hindered modernization.

信用危机已经阻碍了我国经济的发展，阻碍了现代化建设。

In the first part there is an introduction in brief to the history and present market status of the Chinese motorcycle industry; In the second part, there is an introduction in brief to the international motorcycle market, analyzing the marketing characteristics of the Chinese motorcycle export business, find out the key characteristics which influence the Chinese motorcycle export; In the third part, through the analogizing and analyzing on the Chongqing motorcycle export, find out the main problems which have hindered the expansion of the Chongqing motorcycle export; In the forth part, based on the analysis of the China"s entry to "WTO which will influence the motorcycle and its spare-part industry, make out some new basic strategy and further countermeasures to the expansion of the Chongqing motorcycle in overseas market.

首先，在第一部份中简要介绍了我国摩托车工业的发展历史和市场现状，；在第二部分中，介绍了国际市场的摩托车贸易现状，对中国摩托车出口的国际市场特点进行研究，分析影响中国摩托车出口的各类因素；在第三部分中，通过对重庆市摩托车近期出口现状的分析，指出扩大重庆摩托车出口所面临的瓶颈问题；第四部分，在对加入&WTO&以后我国摩托车工业可能受到的影响进行分析的基础上，为扩大重庆摩托车产品的出口提出一些新的思路。

She dreamt that she saw the messenger; now one person, now another, but never any probable person; hindered by a hundred hinderances; now startling and terrible; now ridiculous and trivial; but never either natural or probable; and going down into the quiet house with the memory of these dreams strong upon her, she had been bewildered by the stillness which had betokened that the tidings had not yet come.

她梦见了传递消息的人；一会儿是这个，一会儿是那个，但永远不可能有什么送讯的人；遭到的阻碍有上百个；有的惊人而可怕；有的可笑而微小；但都是不自然、不可能的。强烈地记着这些梦境，她从房间里走下楼去，进入宁静的屋子。她被那一片寂静弄糊涂了，寂静表明消息还没有传来。

Their ugly performance not only seriously blemished Chinese image but also disrupted order in Chinese communities and hindered the economic and social life of the Chinese people.

他们死乞白赖的丑恶表演，不仅严重损害了国家的尊严，也直接影响了华人社区的生活秩序，妨碍了华人的正常经济社会活动。

It goes back to what I told you...

现在回到我告诉过你的。。。

With a supporter in Mr Charest and an admirer in Mr Dumont, Mr Harper may be encouraged to call an election himself.

由于在沙雷那边有个支持者，杜蒙那边有个崇拜者，鼓励哈珀为自己举行一次选举。