辛烷数

例句：

1. 1. The fuel has a high octane number, which means it burns more efficiently.
   这种燃料辛烷值高，燃烧效率更高。
2. 2. The engine requires a specific octane number to operate smoothly.
   发动机需要特定的辛烷值才能顺畅运行。
3. 3. The test results showed that the gasoline had a low octane number, which could affect theperformance of the car.
   测试结果显示该汽油辛烷值低，可能影响汽车的性能。