不饱和碳氢化合物 unsaturated hydrocarbon
含不饱和碳碳键聚合物 unsaturated carbon-carbon bond containing polymer
二十碳不饱和脂肪酸 Unsaturated arachidic acid ; cis-11-Eicosenoic acid
在本实验条件下，观察到17组不饱和碳区吸收峰。
Under the experimental conditions, altogether 17 groups of peaks caused by absorption of unsaturated carbons localities were observed.
当一块含有不饱和碳的铁放在焦炭床上加热的时候，铁表面的碳含量就会由于内部碳原子的扩散而提高。
When iron which is unsaturated with respect to carbon is heated in a bed of coke, the concentration of the carbon near the surface is increased by inward diffusion of carbon atoms.
这些分子的“不饱和”碳键可以使它们形成长链，称为聚合物。
These molecules have "unsaturated" carbon bonds that allow them to be hooked together in long chains, called polymers.
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