chimney  
noun [ C ] uk/ˈtʃɪm.ni/ us/ˈtʃɪm.ni/
  (PIPE)      
 B2 烟囱;烟道
a hollow structure that allows the smoke from a fire inside a building to escape to the air outside
  Factory chimneys belched dense white smoke into the sky. 工厂的烟囱向空中喷吐出浓浓的白烟。 
 - More examples
- A column of smoke rose from the chimney.
- The chimney was puffing out clouds of smoke.
- It can be dangerous to let too much soot accumulate inside a chimney.
- Thick, black smoke was pouring out of the chimney.
- The chimney was made of bricks.
  (PASSAGE)     
 geology specialized(可容一人攀登的)岩石狭缝,一线天 
a narrow vertical passage in the rock of a cliff or mountain, through which a person can climb