automatic fuel oil returning principle

例句：

1. 1. The automatic fuel oil returning principle is crucial for the engine's efficiency.
   自动燃油回油原理对于发动机的效率至关重要。
2. 2. The design of this system adheres to the principle of simplicity and efficiency.
   该系统的设计遵循简单和效率的原则。
3. 3. The automatic fuel oil returning principle ensures that the engine can operate smoothly even when the fuelsupply is interrupted.
   自动燃油回油原理确保即使在燃料供应中断的情况下，发动机也能平稳运行。