asphyxial stage

例句：

1. 1.The asphyxial gases caused the victim to suffocate.
   致命的气体导致受害者窒息。
2. 2. The asphyxial conditions made it difficult for her to breathe.
   窒息的条件使她呼吸困难。
3. 3. The asphyxial situation required immediate medical attention.
   需要立即医疗关注的情况是窒息的。