propylene glvcol

例句：

1. 1.The petroleum industry uses propylene as a raw material for producing olefins.
   石油工业使用丙烯作为生产烯烃的原料。
2. 2. Propylene is a colorless, odorless liquid that is widely used in the chemical industry.
   丙烯是一种无色、无味的液体，在化工行业中广泛应用。
3. 3. In the petrochemical industry, propylene is often used as a feedstock for producing various polymers.
   在石化行业，丙烯常被用作生产各种聚合物的原料。