大学英语词汇短语释义解析及例句 double bond


释义：

double bond [物化] 双键

例句：



The Alkene Double Bond: a Focus of Reactivity.

烯烃的双键：重点是反应活性。



It selects and severs double bond organic matter.

臭氧选择并破坏有双键的有机物。



"One - pot" carbon - carbon double bond formation.

“一锅”法的碳-碳双键形成反应。



Compared with diolefine rubber, EPDM has less double bond.

与二烯烃橡胶相比，EPDM的双键很少。



One atom of oxygen is linked to the nitrogen atom by a double bond.

一个氧原子以双键与氮原子相连。



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。



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。



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 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。



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。



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。



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。



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。



Their cytotoxicity reduced obviously while the double bond in steroidal nucleus or side-chain was saturated.

当甾核或支链中双键被饱和时，其细胞毒性均明显降低。



The results showed that, the structure of polyurethane acrylates had great effect on the conversion of double bond.

研究发现，随着丙烯酸官能度的增多，双键转化率随之降低；



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。



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。



Therefore, we can clearly see that imine double bond is ond kind of important antibacterial functional group of these compounds.

因此，可以明确亚胺双键是该类化合物的重要抑菌官能团之一。



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。



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 organic group further comprises at least one activating group on at least one carbon atom of the C-C single bond or double bond.

所述有机基团进一步包括至少一个在所述C-C单键或双键的至少一个碳原子上的活性基团。