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asphyxiant adj.窒息的;使氣絕的;致假死的。n.窒息劑,絕氣藥;...

asphyxiate

Although helium is nontoxic and inert , it can act as a simple asphyxiant by displacing the oxygen in air to levels below that required to support life 盡管氦無毒且不活潑,通過取代空氣中的氧,使之下降到維持生命所必須的水平以下,它可以成為簡單的窒息物。