an opening that allows air, gas or liquid to pass out of or into a room, building, container, etc. （空气、气体、液体的）出口，进口，漏孔 
air/heating vents 通气孔；热风孔
Oxford Collocations Dictionaryadjective- air
- air-conditioning
- heating
- …
- close
- open
- block
- …
- through a/the vent
- (specialist)
the opening in the body of a bird, fish, reptile or other small animal, through which waste matter is passed out （鸟、鱼等小动物的）肛门 a long, thin opening at the bottom of the back or side of a coat or jacket （大衣等的）衩口，开衩，背衩
Word Originnoun senses 1 to 2 late Middle English: partly from French vent ‘wind’, from Latin ventus, reinforced by French évent, from éventer ‘expose to air’, based on Latin ventus ‘wind’. noun sense 3 late Middle English: alteration of dialect fent, from Old French fente ‘slit’, based on Latin findere ‘cleave’.