Death by illness was out: Sibyl, his sister-in-law on the program, had already died of eclampsia after giving birth, and his former fianc é e, the dreary Lavinia Swire, had succumbed to the Spanish flu.

Valence shell orbital hybridization theory is exactly a synthetic theory that it has absorbed the advantages of these two theories.

价层轨道杂化理论正是在综合了这两种理论的优点之后得到的。

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Nano-particles of SiO2 form the hydrogen bond with carbonyl of PI, which changes the geometrical and electronic structure of PI, but the bond order changes a little.

SiO2纳米颗粒与PI上的羰基形成氢键，使得PI的几何结构和电子结构发生了变化，但键级基本没有变化。

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So if I try to rotate my2 atoms, you see that I have to break that pi bond, because they need to be lined up so that the electron density can overlap.

如果我要试着转动两个原子，你会看到我必须要打破一个π键，因为他们需要连接起来，让那些电子能够重叠。

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So it's very important to be keeping in mind that any time you see a double bond, you have a pi bond there, so you're not going to see any rotation around the bond axis.

所以你们要记住，任何时候你们看到一个双键，这里面有π键，你们不会看到关于键轴的任何转动。

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So in order to rotate a double bond, you have to actually break the pi bond, so essentially what you're doing is breaking the double bond.

为了能够旋转双键，你必须打破一个π键，本质上我们要做的就是打破双键。

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We're already using it up in this pi bond here, so that means we're limited to only two other spots on the molecule, so we have three.

我们已经把它用到这个π键里去了，所以这意味着，我们在分子里只剩下两个位置，所以一共是三个。

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Now let's think about this first pi bond, which will be above and below the bonding axis.

让我们先来看这个π键，它在键轴的上面和下面。

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Sir Thomas could not dissent, as it had been his own arrangement, previously communicated to his wife and sister;

托马斯爵士不能不表示同意，因为这原是他安排的，事前就告诉了他妻子和大姨子。

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He lost his fortune and his home and lived out his life on the generosity of his sister-in-law and Yale.

他失去了财产、家园，全靠他大姨子和耶鲁大学的慷慨帮助才度过生活的难关。

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Based on electron-effect and reaction mechanism, this article discusses Markovnikov's rule, lists several conditions anti-Markovnikov's rule and explains them.

从电子效应和反应历程两个方面探讨马氏规则；

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Discussion of Asymmetry Addition Not Obeying Markovnikov s Rule; Research on Robust Adaptive Backstepping Control for Some Classes of Uncertain Systems

不适合Markovnikov规则的加成反应若干类不确定系统的鲁棒自适应反推控制研究

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Several Conditions against Markovnikov' Rule on Electrophilic Addition to Unsymmetrical Alkenes

不对称烯烃亲电加成中几种反马氏规则的类型

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How to Teach Markovnikov Rule

怎样讲授Markovnikov规则

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The paper discusses the common effect of some factors: inductive effect, conjugation and hyperconjugation, on thd alkene addition reaction, and interprets with examples how to comprehend and apply correctly Markovnikov rule.

本文综合考虑诱导效应、共轭效应和超轭效应等因素对烯烃加成反应的共同影响，并结合具体实例阐述如何正确理解和应用Markovnikov规则。

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Furthermore, the NBO calculation implies that relative stabilities of all 15 con-formers can be attributed to the steric and hyperconjugation effects.

而且，NBO的立体和超共轭分析表明立体交换排斥能和超共轭作用对这些分子的相对稳定性起了重要作用。

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Natural bond orbital analysis shows that these H-bonds can be interpreted with the theory of inter-and intra-molecular hyperconjugation and rehybridization.

自然键轨道分析表明分子内与分子间超共轭和重杂化理论可以解释这些氢键的形成机制。

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In addition, NBO analysis shows that it is hyperconjugation rather than repulsive forces that plays a key role in the relative stabilities of isomers.

此外，通过NBO方法分析了分子的超共轭作用和立体排斥能对异构体稳定性的影响，结果表明超共轭作用是影响各异构体构型相对稳定性的主要因素。

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Thus, theexistance of" hyperconjugation", in electronic theory of organic chemistry is con-firmed intuitively.

从而较直观地阐明了关于“超共轭”的有机化学电子理论；

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At the same time, we should deal properly with all kinds of complicated matters which including the relation of inspection and pass, the relation of reason and benefit, the relation of domestic affairs and external affairs.

实际工作中，出入境边防检查机关应正确处理好把关与通关的关系，有理、有利、有节的关系，内事与外事的关系。

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But the struggle must be waged on just grounds, to our advantage, and with restraint; if any of the three is lacking, we shall suffer setbacks.

但是斗争必须是有理、有利、有节的，三者缺一，就要吃亏。

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