它是多种碳氢化合物的混合体。
各溜分可以由碳氢化合物的碳原子数确定其特征。
The various distillates can be roughly characterized by the number of carbon atoms in their constituent hydrocarbons.
我们必须努力推动技术进步，来帮助我们减少对于碳氢化合物的依赖。
We must work to advance technologies to help us become less dependent on hydrocarbons.
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