smooth combustion

例句：

1. 1.The smooth combustion of the fuel is crucial for efficient combustion.
   燃料的平滑燃烧对于高效的燃烧至关重要。
2. 2.The smooth combustion of the fuel helps to reduce emissions and improve air quality.
   燃料的平滑燃烧有助于减少排放并改善空气质量。
3. 3.The smooth combustion of the fuel ensures a clean and efficient process.
   燃料的平滑燃烧确保了一个清洁且高效的流程。