motor octane number

例句：

1. 1.The new engine has a higher motor octane number than the old one.
   新引擎的汽油辛烷值比旧的高。
2. 2.The car's performance depends on its motor octane number.
   汽车的性能取决于它的汽油辛烷值。
3. 3.The fuel used in this car is specially formulated to have a high motor octane number.
   这辆车使用的燃料特别配制，具有高汽油辛烷值。