fuel air mixture

例句：

1. 1.The engine needs a fuel air mixture of the right ratio to operate efficiently.
   发动机需要正确的燃料空气混合物比例才能高效运行。
2. 2.The pilot adjusted the mixture to achieve better combustion.
   飞行员调整了混合物以达到更好的燃烧效果。
3. 3. The car's engine was running smoothly, but it needed more fuel air mixture for better performance.
   汽车的发动机运行平稳，但为了获得更好的性能，需要更多的燃料空气混合物。