condensed oils

例句：

1. 1. The process of condensing oil is crucial in refining.
   提炼过程中的凝缩油过程至关重要。
2. 2.Condensed oil can be used as a lubricant to reduce friction.
   浓缩油可以用作润滑剂，以减少摩擦。
3. 3.The production of condensed oil requires high-quality raw materials and advanced technology.
   浓缩油的生产需要高质量的原材料和先进的技术。