gear driven fan

例句：

1. 1.The new gear-driven fan is more efficient than the old one.
   这款新的齿轮驱动风扇比旧的更高效。
2. 2.The gear-driven fan is perfect for summer evenings when you need to cool down quickly.
   齿轮驱动的风扇非常适合夏季晚上，当你需要迅速降温时。
3. 3. The gear-driven fan is quiet and easy to use, making it a popular choice for many households.
   齿轮驱动的风扇噪音小且易于使用，因此成为许多家庭的首选。