vent port

例句：

1. 1. The factory has a large ventilation system to keep the air fresh.
   这家工厂有一个大型的通风系统，以保持空气新鲜。
2. 2. The car's engine is designed with a vent to allow exhaust gases to escape.
   汽车的发动机设计有排气口，以便排放废气。
3. 3. The scientist used a vent to release the toxic gas into the atmosphere.
   科学家使用一个排气口将有毒气体释放到大气中。