ventilating device

例句：

1. 1. The hospital needs to ventilate the patient's room to prevent the spread of germs.
   医院需要给病人的房间通风，以防止病菌的传播。
2. 2.The farmer used a fan to ventilate his greenhouse to keep it fresh.
   农民使用风扇给温室通风，以保持其新鲜。
3. 3.After the storm, the house was ventilated thoroughly to remove all the smoke.
   暴风雨过后，房子被彻底通风，以清除所有的烟味。