gasoline refining

例句：

1. 1. The refinery is the heart of the oil industry.
   炼油厂是石油工业的核心。
2. 2. The process of refining gasoline is complex and requires skilled labor.
   汽油精炼过程复杂，需要熟练的劳动力。
3. 3. The refinery produces a variety of petroleum products, including gasoline.
   炼油厂生产各种石油产品，包括汽油。