通过结构改进进行低噪声发动机设计，不仅可以在根源上控制发动机噪声，而且可以改善发动机的性能，还不会使发动机结构变得复杂。

Based on the structural improvement, it not only control the engine noise from root, but also can improve the engine performance without adding the complexity to the engine.

youdao

通过结构改进进行低噪声发动机设计，不仅可以在根源上控制发动机噪声，而且可以改善发动机的性能，还不会使发动机结构变得复杂。

Based on the structural improvement, it not only control the engine noise from root, but also can improve the engine performance without adding the complexity to the engine.

youdao