双键

/ shuāng jiàn /

1
[物化] double bond
... 双键复分解闭环反应苯并吡喃氨基酸肽内酰胺磺酰胺磷杂环化合物 [gap=475]Keywords】: ORGANIC SYNTHESIS,DOUBLE BONDS,DOUBLE DECOMPOSITION,RING CLOSURE REACTION,BENZOPYRAN,AMINO ACID,PEPTIDE,LACTAM...
2
double linkage
... double decomposition 复分解 double linkage 双键 double refraction 双折射 ...
3
double union
... double tube core barrel 复式岩心管 double union 双键 double unit 双职工炸区 ...
4
double key
... double kernel cake 双仁香酥 double key 双键 double knife noodle pressing mac你好ne 双刃压面条机 ...

短语

1
共轭双键
conjugated double bond ; conjugated bond
2
双键移位
物化 double bond migration ; migration of the double bond ; double band clearing
3
累积双键
物化 cumulated double bond

1
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,.
2
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.
3
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).

双键
双键是共价键的一种，共价键，就意味着共用电子对的存在。简单的说，就是这一对电子，由键的两方各出一个，彼此共用。因此，一个共价键就可以填补一个最外层电子的空额。

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