unsaturated carbon-carbon bond containing polymer 含不饱和碳碳键聚合物
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。
Saturated is a single bond between carbon atoms in the fatty acid . Unsaturated is the double bond.
不同的碳长度脂肪酸和不同数量的双结合给脂肪以独特的特性。
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