大量隧道火灾案例表明，烟气和毒气是人员窒息中毒伤亡的主要原因。

Many tunnel fire incidents show most people died from smoke choking and toxic gases.

youdao

煤矿坑里的工人们为毒气所窒息。

The men in the coal-mine were asphyxiated by the bad gas.

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神经毒气一般通过窒息导致死亡。

Nerve gases generally cause death by asphyxiation.

youdao

神经毒气一般通过窒息导致死亡。

Nerve gases generally cause death by asphyxiation.

youdao