求翻译：但因C9石油树脂的分子结构中含有不饱和双键和苯环，对其色号、光和热稳定性以及软化点都有不好的影响，限制了它的应用范围。是什么意思？

But the molecular structure of C9 petroleum resin containing unsaturated double bonds and benzene ring , its color number, light and thermal stability and a softening point has a bad effect , limits its scope of application.

But the C 9 oil resin in the molecule containing unsaturated double-key and Psilocybin, for its color, optical and thermal stability, as well as Softening Point is a bad influence, limiting its scope of application.

Because but in the C9 petroleum resin molecular structure includes not the saturated duplet bond and the benzene ring, to its color number, the light and the thermostability as well as the softening point all has not the good influence, has limited its application scope.

But the molecular structure of the C9 petroleum resin containing unsaturated and aromatic ring, its color, light and thermal stability as well as softening point has a bad effect, limiting its scope of application.

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