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.
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.
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).
烯醇一种有机化合物，包含有与碳原子键连的羟基群，该碳原子反过来又与另一个碳原子双键连接。
An organic compound containing a hydroxyl group bonded to a carbon atom, which in turn is doubly bonded to another carbon atom.
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。
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。
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.
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