electric fan

例句：

1. 1. This electric fan is very efficient and quiet.
   这台电风扇非常高效且噪音小。
2. 2.The electric fan has been my best friend since I moved into the new apartment.
   自从搬到新公寓后，电风扇就成了我最好的朋友。
3. 3.The electric fan was a lifesaver during the summer heatwave.
   在夏季热浪期间，电风扇救了我的命。