selective combustion

例句：

1. 1. The selectivecombustion of the fuel in theengine is crucial for efficient operation.
   发动机中燃料的选择性燃烧对于高效运行至关重要。
2. 2. Theselective combustion of the fuel inthe engine helps to reduce emissions.
   发动机中燃料的选择性燃烧有助于减少排放。
3. 3. In orderto improve energy efficiency, researchers are exploringnew methods for selective combustion.
   为了提高能源效率，研究人员正在探索新的选择性燃烧方法。