三键

It has also been described that the different interaction between host and the anions and the effect of electron – withdrawing group substitution on host-guest interaction from geometry features, frequency analyses, NBO analyses and frontier orbital of interaction.

本文还从几何构型、振动光谱、NBO分析及前线轨道等方面来阐述β-三氰基乙烯取代杯[4]吡咯与不同阴离子氢键相互作用的本质以及吸电子取代基的引入对杯[4]吡咯与F-和Cl-之间主-客体相互作用的影响。

Our company was founded in the 1970s and early 2000 for the restructuring of private enterprises, the Company has machinery manufacturing, production and processing a long history, the factory covers 40,000 square meters, of which the production, storage, office space 26,000 square meters, has a staff Nearly 500, including engineering and technical staff of 70 people (three professors, six were in Engineering, college education 82), the four companies under the Ministry: the Ministry of Health technical, marketing department, QC, enterprises and the Ministry of Finance Three plants (spline shaft, hydraulic suspension, the crankshaft casting process).

我公司始建于二十世纪七十年代，2000年初改制为民营企业，本公司有着机械制造、生产加工悠久的历史，厂区占地40000㎡，其中生产、仓储、办公用房26000㎡，拥有员工近500名，其中工程技术人员70人（教授级3人、高工6人、大专以上学历82人），公司下设四大部：生技部、营销部、质检部、企财部和三个分厂（花键轴类、液压悬挂、曲轴铸造金加工）。

UV-curable hyperbranched poly was synthesized via organosilicon polymer bearing silicon hydride end groups and vinyltriallylsilane at the presence of Pt/C catalyst.

通过含硅氢键的超支化聚合物和乙烯基三烯丙基硅烷在铂催化剂作用下反应制备了可紫外光固化的超支化聚硅氧基硅烷。

In addition to GM's OnStar system, Rendezvous comes with a full complement of standard safety and security features, including dual-stage frontal air bags, safety cage construction, remote keyless entry, PASS-Key III theft deterrent system, Rear Park Assist and four-wheel anti-lock disc brakes.

除了通用汽车的OnStar系统，龙都配备了全面的安全标准和安全特性，包括双前侧气囊，安全笼建设，遥控钥匙，密码键三盗窃威慑系统，倒车辅助系统和四四轮防抱死盘式制动器。

Rendezvous comes with a full complement of safety and security features, including dual frontal air bags, safety cage construction, remote keyless entry, PASS-Key III theft deterrent system and four-wheel anti-lock disc brakes.

龙都配有全套的安全和安全特性，包括双前侧气囊，安全笼建设，遥控钥匙，密码键三盗窃威慑系统和四轮防抱死盘式制动器。

Molecular orbital analysis, nucleus-independent chemical shift analysis and natural bonding orbital analysis showed that they have aromaticity or non-aromaticity.

通过分子轨道分析、核独立化学位移分析以及自然键轨道分析，说明B〓和B〓是具有三个π电子的非芳香体系；B〓是具有两个π电子的芳香体系。

The functional group linked to carbyne carbon has a strong effect on the reactivity and strength of metal-carbon triple bond.

在卡拜化合物中，与卡拜碳上相连的基团的性质强烈影响金属—碳三重键的强度及其反应活性。

An unsaturated fatty acid whose carbon chain has one double or triple valence bond per molecule; found chiefly in olive oil and chicken and almonds.

碳链的分子均有一个二价或三价键的不饱和脂肪酸，主要存在于橄榄油、小鸡和杏仁中。

An unsaturated fatty acid whose carbon chain has one double or triple valence bond per molecule; found chiefly in olive oil and chicken and almonds.

碳链的分子均有一个二价三价键的不饱和脂肪酸，主要存在于橄榄油、小鸡和杏仁中。

In such case,the bilirubin was adsorbed on the silver colloid particle with the two planar pyrromethenone groups intercalated into the globe silver colloid particle,however,the biliverdin might lie flat on the surface of silver colloid with syn-synsyn conformation.

通过对其谱带的指认分析，表明胆红素形成了三对内氢键，并以其两个吡咯亚甲基酮环沿银胶颗粒表面切向方向镶嵌在银胶颗粒上，而胆绿素则以顺式-顺式-顺式构型平躺吸附于银胶颗粒表面。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。