The fan at the window made a small whispering roar. 窗上的通风机发出了耳语般轻微的嗡嗡声。
The UK Building Regulations permit ventilation fans to be eliminated if trickle ventilators and passive stack extract vents are provided. 英国建筑规范允许在设有细流通风设备和被动式的烟囱排烟道的情况下，通风机可以不设。
This car has a fan cooled radiator. 这部汽车有台风扇冷却的散热器。
A higher fan spin rate leads to greater air flow. 风扇扇页转速高，则风力大。
