我们来考虑一下如何划分单键、双键和三键。
Let's think about how we can classify single and double and triple bonds,.
“一锅”法的碳-碳双键形成反应。
臭氧选择并破坏有双键的有机物。
包含两个双键的化合物叫做二烯烃。
烯烃的双键：重点是反应活性。
环外的双键的张力效应导致相反的结果。
With exocylic double bonds the effect of strain is in the opposite direction .
实际上，你不能转动一个双键，它使得你的分子很坚固。
So really, you can not ever rotate a double bond, it makes your molecule very rigid.
与二烯烃橡胶相比，EPDM的双键很少。
脂肪酸被生物体转化成包含碳氧双键即羰基的醛。
The fatty acids are then converted by the organisms to an aldehyde that includes a carbon atom bonded to an oxygen atom (together they create what's called a carbonyl group).
所以双键把它们锁定在某一特定形状，是十分重要的。
So it's very important that the double bond locks it in a particular conformation.
在乙烯分子中是由一个双键将两个碳原子连结在一起的。
In the ethyne molecule, a double bond links together the two carbon atoms.
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。
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.
这些化合物的最大用途在于双键与其它化学物质的反应。
They react by adding other chemical agents at the double bond to form derivatives or polymers.
当甾核或支链中双键被饱和时，其细胞毒性均明显降低。
Their cytotoxicity reduced obviously while the double bond in steroidal nucleus or side-chain was saturated.
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。
Or if we look at how strong it is, it's actually stronger than a single bond, but weaker 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。
So if we look at its length, it's actually shorter than a single bond, but longer than a double bond.
合成了既有环氧基团又含不饱和双键的环氧丙烯酸单酯树脂。
A dual-curing epoxy monoacrylate resin was synthesized, which contain both epoxide groups and unsaturated double bonds.
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。
Olefin (or alkene) Any unsaturated hydrocarbon containing one or more pairs of carbon atoms linked by a double Bond (see covalent Bond, saturation).
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。
Depending upon reaction conditions, the product may be a polyketone formed by addition polymerization of the ketene double bond.
本文简要地综述了基于连接表的手性中心和双键立体化学的描述方法。
The present paper reviews the methods used in connection table for the presentation of stereochemistry, particularly for the chiral carbons and double bonds.
该氨酯油中引入了羧基阴离子和丙烯酸双键，用有机胺中和后溶于水中。
The resin can be solved in water by neutralizing carboxylic groups and double bonds therein with organic amine.
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 established method provides a new technical tool for the location of double bond positions in the polyunsaturated fatty acids.
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。
Monounsaturated fatty acid (MUFA) is a sort of fatty acids, including a double bond in its carbon chain.
本文还对漆酚类侧链中双键的存在形式，主要组成及变化进行了分析讨论。
Furthermore, the existing form, main composition and their variation of double bond in the side-chain of urushiols were discussed as well.
富勒烯通常成为巴克球，是一种由60个碳原子以单键和双键相连组成的足球形碳单质。
Buckyballs, as they became known colloquially, are football-shaped molecules made of 60 carbon atoms linked by single and double bonds.
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。
The peptide bond has substantial rigid double-bond character and affects properties of proteins by limiting available information.
通过使用模拟开关CD4052巧妙地解决了工控PC外接双键盘的冲突问题。
The conflict problem of attaching two keyboards on one PC by using the chip CD4052 is resolved.
这个带有自由基的反应种通过打开双键加入到单体分子上，从而形成新的自由基。
The reactive species, which may be a free-radical, adds to a monomer molecule by opening the p-bond to form a new radical.
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。
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。
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.
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