underground air raid shelter

例句：

1. 1. The city has many underground air raid shelters that are used during emergencies.
   这个城市有许多在紧急情况下使用的地下防空掩体。
2. 2. During World War II, many people hid in underground air raid shelters to escape bombings.
   二战期间，许多人躲藏在地下防空掩体中以躲避轰炸。
3. 3. The soldiers were instructed to find shelter under the ground during an air raid.
   士兵们被指示在空袭时寻找地下避难所。