long chain hydrocarbon

例句：

1. 1. The long chainhydrocarbons in the oil are responsible for its high viscosity.
   石油中的长链烃类化合物是其高粘度的原因。
2. 2. Long chain hydrocarbons are widely used as fuels and lubricants.
   长链烃类化合物被广泛用于作为燃料和润滑油。
3. 3.The long chain hydrocarbons in petroleum have a significant impact on the environment.
   石油中的长链烃类化合物对环境有重大影响。