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For the fourth part, we first designed a hydrogen bonding-mediated rigidified polymer. The X-ray crystal analysis of its fragment molecules showed the existence of consecutive intramolecular hydrogen bonds, which forced the backbone to adopt a rigidified planar conformation.

在第四部分工作中，首先我们设计了一种分子内氢键控制构象的聚合物，通过对其氢键骨架的单晶培养和结构解析证实在它们的结构中存在三中心氢键使得它们采取平面刚性的构象。

The approaches taken to prepare NO releasing polymers are classified into three catogories:(1)doping discrete NO nonors within polymer matrix;(2)covalent attachment of NO resealing moieties on the filler particles of the polymer to provide NO releasing properties and then dispersion them into the polymer backbone;(3) covalent linkage of NO donors to polymer molecules.

制备可释放NO聚合物材料的方法主要有3种：（1）通过物理掺杂的方式将小分子的NO供体分散到聚合物材料中；（2）对聚合物材料的填料微粒进行化学改性，得到可释放NO的填料粒子，再将其填充到聚合物材料中；（3）通过共价键将可释放NO的基团连接到聚合物主链及侧链上。

The results indicate that the backbone of PBSZ is -Si-N-B- linkage in the form of borazine and C is in the form of Si-CH3. The ceramic yield of the PBSZ pyrolysed at 1000℃ in N2 and NH3/N2 atmospheres is 63wt% and 61wt%, respectively.

结果表明，先驱体的结构骨架为-Si-N-B-，其中B、N以硼氮六环的形式存在， C以Si-CH3形式存在。

BBC SO is the backbone of the BBC Proms.

BBC交响乐团还是一年一度的BBC逍遥音乐会中的主角。

There were official, private, and shop printings, of which the shop printing was the backbone.

印刷是中国古代白话小说戏曲传播中最重要的技术媒介。

Amino acids are important biological compounds that played an essential role in the formation of peptides, the backbone of protein, in the prebiotic chemistry of the early Earth for the origin of life.

在早期地球原始化学生命起源过程中，氨基酸是重要的必需的生物化合物，生成肽和蛋白。

Jincheng Motorcycle Group Motorcycle Parts Factory Wuxi City Jincheng Group is the production of motorcycle accessories targeted the backbone of enterprise, production of spare parts for the main frame components, handlebar components, fat hanging scaffold components, after the arm, in the hold, single support, the former foot pole, full chain cover, fat hanging bracket, reversing the welding rod and other stamping parts.

金城摩托车集团无锡市摩托车配件厂是金城集团定点生产摩托车配件的骨干企业，生产的配件主要有车架组件、车把组件、吊发支架组件、后摆臂、中撑、单撑、前脚踏杆、全链罩、吊发支架、扭转杆以及其它冲压焊接件。

Secondly, the plutocrats in Korea drive the economic development. The industries of plutocrats basically include the backbone industries, which made a large macro-economic contribution.

第二，韩国大企业集团带动韩国经济的发展，大财阀的产业基本都包括了韩国的骨干产业，它们对韩国宏观经济的贡献度是非常大的。

Palate: The Pinotage is soft and sweet while the Merlot and Shiraz offers a subtle spiciness. The Cabernet Sauvignon is the backbone of the blend.

口感： 比诺特增添了柔和与甜美，梅洛和西拉则带出丝丝香料气息，赤霞珠则赋予了这款酒结构。

Backbone and sidechains were denoted by SMILES, and they were permutated and combinated to form virtual combinatorial library.

该方法用SMILES码代表骨架和侧链，通过对其进行排列组合生成虚拟组合化学库。

They have quite a lot of work to do.

他们有许多工作要做。

Let us give you a more elaborate example of this process.

让我们给你这个过程的更多的详细例子。