窒息物

例句：

1. 1. The patient was asphyxiated by the gas fumes.
   病人被气体烟雾窒息了。
2. 2. The firefighters had to asphyxiate themselves to save the children.
   消防员不得不自己窒息以救出孩子们。
3. 3. The poisonous gases asphyxiated the soldiers on the battlefield.
   有毒气体使战场上的士兵窒息。