ventilating engine

例句：

1. 1. The ventilating engine is essential for maintaining a comfortable indoor environment.
   通风发动机对于保持室内舒适环境至关重要。
2. 2.The new air-conditioning engine has significantly improved the cooling efficiency of the vehicle.
   新型空调发动机显著提高了车辆的制冷效率。
3. 3.The engineers are working on developing a more efficient ventilating engine to reduce emissions.
   工程师们正在努力开发更高效的通风发动机，以减少排放。