smoke channel

例句：

1. 1. The firefighters used the smoke channel to direct the smoke away from the building.
   消防员使用烟雾通道将烟雾引向建筑物外。
2. 2.The smoke channel was designed to prevent the spread of smoke in the event of a fire.
   烟雾通道的设计是为了在发生火灾时防止烟雾扩散。
3. 3. The smoke channel was so narrow that it was difficult for people to pass through.
   烟雾通道非常狭窄，人们难以通过。