Or if we look at how strong it is, it's actually stronger than a single bond, but weaker than a double bond.
或者如果我们看键的强度的话，它实际上比单键更强，而比双键更弱。
So really, you can not ever rotate a double bond, it makes your molecule very rigid.
实际上，你不能转动一个双键，它使得你的分子很坚固。
So if we look at its length, it's actually shorter than a single bond, but longer than a double bond.
因此如果我们看它的键长的话，它实际上比单键更短，却比双键更长。
And we find the same thing for these two atoms here, it's not actually a double bond, it's somewhere between a single bond and a double bond.
而且我们发现这两个原子的情况是一样的，它其实不是一个双键，而是介于单键与双键之间的。
And by that what we mean is that they're absolutely identical, and it turns out that this here is not a double bond, it's not a single bond either, it's actually something in between.
这意味着它们是绝对完全相同的，实际情况应该是这不是一个双键，这也不是一个单键，而是介于两者之间的状态。
All right, so let's think of a more complicated example of having a double bond, and maybe a more interesting example, and this is talking about benzene.
好了，让我们来看关于双键的，一个更复杂的例子，也许是更有趣的例子，我们要讨论苯环。
And something that we'll see later on is that triple bonds, for example, are going to be stronger than a corresponding double bond or a corresponding single bond.
而我们以后还会看到三键，举例来说，应该更强，相较于相应的双键，或者相应的单键来说。
So let's take a look at what actually happens if we're talking about a carbon-carbon double bond, we're going to have a double bond.
让我们来看一看碳碳双键的情况，例如在乙烷里，我们有个双键。
In the ethyne molecule, a double bond links together the two carbon atoms.
在乙烯分子中是由一个双键将两个碳原子连结在一起的。
They react by adding other chemical agents at the double bond to form derivatives or polymers.
这些化合物的最大用途在于双键与其它化学物质的反应。
The double bond is attacked by the oxygen, forming aldehydes and carbonyls.
双结合受氧的攻击形成乙醛和碳酸基。
Depending upon reaction conditions, the product may be a polyketone formed by addition polymerization of the ketene double bond.
随着反应条件的不同，产物可以是由烯酮的双键加成聚合得到的聚酮。
Olefin (or alkene) Any unsaturated hydrocarbon containing one or more pairs of carbon atoms linked by a double Bond (see covalent Bond, saturation).
烯烃：含有一对或多对由双键连接的碳原子的一类不饱和烃。
Ring closing metathesis (RCM) of dienes to cycloalkene provides an important tool for C-C double bond formation catalyzed by metal carbene.
关环转换反应是形成碳碳双键的重要反应之一，即双烯化合物在金属碳烯催化下关环得到环烯类化合物。
Though with the smile of his dear face he draws mother's yearning heart to him, yet his little cries over tiny troubles weave the double bond of pity and love.
虽然他那可爱的小脸儿的微笑，系着妈妈热切的心，然而他因小小麻烦而发出的啜泣，却编织成了怜与爱的双重牵绊。
Though with the smile of his dear face he draws mother's yearning heart to him, yet his little cries over tiny troubles weave the double bond of pity and love.
虽然他用了可爱的脸儿上的微笑，引逗得他妈妈的热切的心向着他，然而他的因为细故而发的小小的哭声，却编成了怜与爱的双重约束的带子。
Its branch chains having double bond can copolymerize with vinyl monomers (such as styrene or vinyl toluene) forming a thermosetting resin.
该树脂具有外双健，可与各种乙烯基单体进一步共聚形成一系列热固性树脂。
"One - pot" carbon - carbon double bond formation.
“一锅”法的碳-碳双键形成反应。
So it's very important that the double bond locks it in a particular conformation.
所以双键把它们锁定在某一特定形状，是十分重要的。
Compared with diolefine rubber, EPDM has less double bond.
与二烯烃橡胶相比，EPDM的双键很少。
The established method provides a new technical tool for the location of double bond positions in the polyunsaturated fatty acids.
所建立的方法为不饱和脂肪酸碳链中双键位置的确定提供了新的技术手段。
The key reactions included the formation of 9, 15-cyclopropyl function and double bond migration in the a ring to reestablish the GA skeleton.
本合成工作的关键为9,15环丙基的形成及在重建GA骨架时a环中双键的重排反应。
It selects and severs double bond organic matter.
臭氧选择并破坏有双键的有机物。
A series of amides of piperidin were synthesized and used for studies on the partial double-bond feature of the amide bonds.
合成了一系列六氢吡啶酰胺化合物以研究酰胺键的双键性质。
The relative stereochemistry of the 1, 10-double bond and that of the methoxyl, methyl, and acetoxy groups were determined by NOESY experiments and analyses of the coupling constants.
通过NOESY实验以及偶合常数的分析，确定了其结构中1,10位双键和甲氧基、乙酰氧基、甲基等基团的相对构型。
Monounsaturated fatty acid (MUFA) is a sort of fatty acids, including a double bond in its carbon chain.
单不饱和脂肪酸(MU FA)是脂肪酸的一种，其碳链上只有一个双键。
The peptide bond has substantial rigid double-bond character and affects properties of proteins by limiting available information.
肽键实质上具有稳定的双键特性，并且通过限制有效信息来影响蛋白质的特性。
And there should a certain amount of double bond of carbon in the multifunctional monomers so as to suppress the degradation of PP.
若多功能单体分子中含有一定含量的碳—碳双键，则能很好地抑制降解。
The Alkene Double Bond: a Focus of Reactivity.
烯烃的双键：重点是反应活性。
The effect of the ratio of hydrogen peroxide to double bond of allyl group, reaction temperature and reaction time on epoxidation was investigated.
考察了双氧水与烯丙基双键配比、反应温度和反应时间对环氧化反应的影响。
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