烟幕

例句：

1. 1. The smoke from the factory has made the air very thick.
   工厂的烟雾让空气变得非常浓重。
2. 2. The pilot used a smoke screen to hide from enemy planes.
   飞行员使用烟幕来躲避敌人的飞机。
3. 3. The firefighters used smoke bombs to put out the blaze.
   消防员使用烟弹来扑灭大火。