fire smothering gas

例句：

1. 1. Firefighters used fire smothering gas to extinguish the fire.
   消防员使用灭火气体来扑灭大火。
2. 2.The fire smothering gas was released into the room to put out the flames.
   将灭火气体释放到房间里以扑灭火焰。
3. 3.The fire smothering gas was used to protect the building from further damage.
   使用灭火气体来保护建筑物免受进一步损害。