四开

The anionic polymerization of octamethylcyclotetrasiloxane (D4) catalyzed by tetramethyl ammonium hydroxide in the presence of water under conditions of high temperature and oxygen-off was investigated.

以八甲基环四硅氧烷为单体，四甲基氢氧化铵为催化剂，微量水为链封端剂，进行有水条件下环硅氧烷阴离子开环聚合。

It was crazy. For the first three or four weeks of the season I was pitching with four rookies and a couple of them are now in Double-A. We just had a bad run of health.

在这一季的前三到四个礼拜，我上场投球，带著四个菜鸟，其中有二个现在正待在2A，我们只是有一个很糟糕的开季伤兵问题。

A scheme to connect by tramline the Cattle Market (North Circular road and Prussia street) with the quays (Sheriff street, lower, and East Wall), parallel with the Link line railway laid (in conjunction with the Great Southern and Western railway line) between the cattle park, Liffey junction, and terminus of Midland Great Western Railway 43 to 45 North Wall, in proximity to the terminal stations or Dublin branches of Great Central Railway, Midland Railway of England, City of Dublin Steam Packet Company, Lancashire and Yorkshire Railway Company, Dublin and Glasgow Steam Packet Company, Glasgow, Dublin and Londonderry Steam Packet Company, British and Irish Steam Packet Company, Dublin and Morecambe Steamers, London and North Western Railway Company, Dublin Port and Docks Board Landing Sheds and transit sheds of Palgrave, Murphy and Company, steamship owners, agents for steamers from Mediterranean, Spain, Portugal, France, Belgium and Holland and for Liverpool Underwriters' Association, the cost of acquired rolling stock for animal transport and of additional mileage operated by the Dublin United Tramways Company, limited, to be covered by graziers' fees.

另计划铺一条电车道把牲畜市场和码头连接起来。这条电车道和（作为大南部与大西部铁道线的延长）将从利菲联轨点的牲畜牧地铺设到北堤坝四十三至四十五号大西部中区铁路终点站与连接线是平行的。附近有大中央铁路、英国中部铁路、都柏林市班轮公司、兰开夏-约克郡铁道公司、都柏林-格拉斯哥班轮船公司、格拉斯哥-都柏林-敦德里班轮公司、英国-爱尔兰班轮公司、都柏林-莫克姆轮船、伦敦-西北铁道公司等的终点站或都柏林分店；都柏林港码头管理处卸货棚，帕尔格雷夫-墨菲公司的船主们和来自地中海、西班牙、葡萄牙、法国、比利时和荷兰的轮船公司那些代理人的临时堆栈，还有利物浦海上保险协会的临时堆栈。运输牲畜所需全部车辆以及额外里程由都柏林市联合电车公司经营管理，费用由畜牧业者负担。

What these three edifices manifest is "concrete-form imagery": The most eye-catching feature of the Grand Louvre expansion project is I.M. Pei's glass pyramid, employing modern-day materials to manifest anew the dream of the ancient Egyptians, to transcend mundane existence and to enter into a heavenlyparadise beyond the influence of events in time and space and not subject to natural deterioration; the four-sided La Defense Arch symbolizes a window "opened to the world and welcoming the future"; and the French National Library's four L-shaped glass-walled towers concretely represent opened books standingon end, giving the viewer the immediate impression of "book."

这三件建筑作品呈现的都是「具支配之世外桃源的古老梦想；拉德芳斯凯旋门象徵「一扇开向世界、迎向未来」像的意象」：大罗浮宫计画中最受注目的，是贝聿铭的玻璃帷幕金字塔，使用现代材料重现埃及民族渴望超脱其生存的现世，进入一个不受时间与自然毁坏法则的窗子；国家图书馆则以四座L型玻璃帷幕高塔，具体表现出四本打开立放的书，直接传递「书」的立即印象。

These compounds are of substantial interest both inviewpoints of theory and practical applications, mainlyunder the stimulus to achieve synthetic models either foractive sites of iron-sulfur proteins or for transitionmetal catalysts. This thesis describes the synthesis, structures andconformations of 51 new iron-sulfur cluster complexes,which have been characterized by elemental analysis andstandard spectroscopic methods. In addition, single-crystalX-ray diffraction analyses were performed for 4 representa-tive new compounds. Reactivities of μ-〓 with mono- and di- Grig-nard reagents derived intermediates toward various organicelectrophilic substrates were studied, along with complexa-tion of arynyl-containing iron-sulfur clusters by 〓Thus, several bridged, non-bridged, monomeric, dimeric,homonuclear, heteronuclear iron-sullfur and iron-sulfur co-balt-carbon cluster complexes were synthesized. A novelreaction and convenient route for the synthesis in highyield of tetranuclear iron complexes 〓 containing atetracoordinated sulfur atom was discovered, whereas aplausible mechanism based on experimental results was propo-sed for the formation of the new cluster type.

鉴于有机铁硫原子簇化学在基础理论发展和应用方面的重要意义，因此我们开展了这一课题的研究，并取得以下主要成果： 1、本文共合成了51个新有机铁硫及含钴碳簇基的有机铁硫原子簇配合物，除用元素分析，NMR，IR，MS法表征其结构和构象外，还用X-光衍射技术测得四个代表性配合物的单晶结构和构象； 2、我们业已发现炔基Grignard试剂同〓可形成一种&开环&与&闭环&中间物的平衡混合物，研究该平衡混合物同各种亲电试剂的反应； 3、研究发现了一种可高产率地形成〓含〓四配位硫挛合簇的新化学反应并对此反应提出了—种有趣的反应机理； 4、首次由1，4-二溴丁烷双Grignard试剂与〓制得一种新型铁硫簇双硫阴离子活性中间体，并进而研究了它的亲核反应性能； 5、找到了通过〓的光化学反应来合成簇合物〓-〓的一条有实用价值的新路线。

Influence of properties of substituents on different reaction steps of various tetrazole derivatives has been approached as well.

研究了取代基性质对不同异构体和不同热解步骤的影响，发现四唑衍生物与相应的叠氮化合物之间存在平衡，吸电子取代基有利于平衡向生成叠氮化合物方向移动，取代基通过场效应和共轭效应影响5-取代-1H四唑的开环反应。

The cationic photopolymerization of tetrahydrofuran was carried out initiated by diphenyliodonium hexafluoroarsenate induced with ultraviolet and sensitized with dimethoxybenzoin and acridine yellow separately.

四氢呋喃的均聚物聚四氢呋喃是生产聚醚型聚氨酯和聚酯弹性体的重要原料，它是由THF通过正离子开环聚合反应制备而成。

Product main business: 1, 1400 ~ 2500mm, single, three, five, seven corrugated cardboard production line 2, 2200 ~ 3500mm, double, three, four, five-color printing slotting die-cutting machine three, 2400 1200mm automatic visco-box machine , semi-automatic machine stick me four, all kinds of specifications±sub-machine semi-automatic paper isobar nail box machine, paper balers, etc. Friday, 800 ~ 1620 mm automatic platen die-cutting the six-ping, 1100 ~ 1450mm automatic paper mounting machines, seven semi-automatic paper mounting machine, a variety of bundlers, eight winding machine, all kinds of specifications, types of testing equipment carton¨Buck Shanghai Machinery Co., Ltd. of China's packaging industry and the packaging machinery market very well.

主要经营产品：一、1400~2500mm ，单、三、五、七层瓦楞纸板生产线二、2200~3500mm，双、三、四、五色印刷开槽模切机三、2400×1200mm 全自动粘箱机、半自动粘箱机四、各种规格的薄刀分纸压线机半自动钉箱机、废纸打包机等五、800~1620 mm 全自动平压平模切六、1100~1450mm全自动裱纸机、半自动裱纸机七、各种规格的捆扎机、缠绕机八、各种规格、类型纸箱检测设备上海川斯霸克机械有限公司对中国包装行业及包装机械市场非常了解。

Chapter Two is about the history of embroidery including the folk embroidery and the imperial embroidery with its' embroiderers, and symbolic culture of embroidery. Chapter Three is about the rising of Zhenhu embroidery and it's relations with Zhenhu embroiderers, including leaving the soil to acknowledge the masters as their teachers, then they establish shops in the town. Chapter Four is about the producing, dealings and expanding the market of embroidery, including how to produce, transport, sell the embroidery concretely and expand the embroidery market.

第一章绪论介绍了论文的选题由来、意义和写作方法；第二章是关于苏绣的历史考察，介绍苏绣由&民间绣&向&闺阁绣&再到&宫廷绣&的历史演变及其文化象征意义；第三章是绣女与镇湖刺绣业的兴起，介绍镇湖绣女从土地上走出来拜师学艺，再到镇上开店的经过；第四章是刺绣的生产、交易和市场的扩张，介绍绣品具体的加工、运输、销售，以及绣女开拓市场的整个过程；第五章是绣女的角色转换与社会分层，介绍开店绣女的身份转变及由农到&非农&的适应过程；第六章是绣女的生活世界，介绍绣女在刺绣工作之外的家庭生活、社会活动以及思想观念的变化。

Its printing speed of merchandizes high performance under normal type are highly manoeuvrable 2 million four-colour/off both sides using dualcolor/monochrome, commercial business, half-eight type speed as much as 3.5 million ~ 5 million above the park off color.

其印速矮外示在凡是书刊胶轮的最矮时速达2不一差开双背四色／双色／单色帖，贸易、半贸易八色胶轮时速更矮达3.5不一~5不一以上差开色令。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。