fuel bed depth

例句：

1. 1.The engine's fuel bed depth is critical for its performance.
   发动机的燃料床深度对其性能至关重要。
2. 2. The engineer carefully measured the fuel bed depth before starting the engine.
   工程师在启动发动机前仔细测量了燃料床深度。
3. 3.The research team found that increasing the fuel bed depth could improve the engine's efficiency.
   研究团队发现，增加燃料床深度可以提高发动机的效率。