gasoline olefinicity

例句：

1. 1. The car needs gasoline to start.
   这辆车需要汽油才能启动。
2. 2.Gasoline is a common fuel for cars.
   汽油是汽车的常见燃料。
3. 3.Gasoline prices have been increasing recently.
   最近，汽油价格一直在上涨。
4. 1. The new engine has a high degree of olefinicity.
   这款新发动机具有很高的烯烃性质。
5. 2. The chemical industry relies heavily on the olefinicity of natural gas.
   化工行业严重依赖天然气的烯烃性质。
6. 3. The olefinicity of petroleum plays a crucial role in its refining process.
   石油的烯烃性质在其精炼过程中起着至关重要的作用。