ventilation hood

例句：

1. 1. The engineers are working on a new design for the ventilation hood.
   工程师们正在为通风罩设计一个新的方案。
2. 2. The factory has installed several exhaust hoods to improve air quality.
   工厂已经安装了好几个排气罩来改善空气质量。
3. 3. The car's engine is equipped with an air vent and an exhaust hood.
   这辆车的发动机配备了一个进气口和一个排气罩。