1. Proper ventilation is essential in maintaining good indoor air quality.
适当的通风对保持室内空气质量至关重要。

2. The ventilation system in the building needs to be upgraded to improve air circulation.
建筑物的通风系统需要升级以改善空气循环。

3. Make sure to open the windows for ventilation during cooking to prevent the buildup of fumes.
烹饪时要确保打开窗户通风，以防止烟雾积聚。

4. The lack of proper ventilation in the room caused it to feel stuffy and uncomfortable.
房间缺乏适当的通风，导致感到闷热和不舒服。

5. The ventilation shafts in the mine help to circulate fresh air to the workers underground.
矿井中的通风管道帮助将新鲜空气循环到地下的工人。

6. It is important to regularly clean and maintain the ventilation ducts to ensure proper airflow.
定期清洁和维护通风管道是非常重要的，以确保空气流通顺畅。