1、The air in the room was so polluted that it became almost irrespirable.
房间里的空气污染如此严重，几乎无法呼吸。
2、The mountaineer had to wear a special mask to protect himself from the irrespirable altitude.
登山者不得不戴上特殊的面具，以保护自己免受高海拔带来的无法呼吸的环境的影响。