scavenging air non-return valve

例句：

1. 1.The team was scavenging through the rubble for supplies.
   团队正在废墟中搜寻物资。
2. 2. The search party scoured the area for any survivors.
   搜救队在该地区搜寻任何幸存者。
3. 3. The scavengers were rummaging through the trash for valuable items.
   拾荒者正在垃圾堆里寻找有价值的物品。