苯是一种有高毒性的毒素，它会致癌。
Benzene is a highly poisonous toxin that is also carcinogenic.
机舱起火会产生具有高浓度和高毒性的烟雾，因此要捂住口鼻防止吸入过量烟雾。
The smoke in an airplane fire can be very thick and highly toxic, so cover your nose and mouth with a cloth to avoid breathing it in.
如果你怀疑你的宝宝已吞食了某种高毒性的物质，则应请求急救服务并尽快将宝宝带到医院救治。
If you suspect your baby has taken a very toxic substance, call the emergency services and get the baby to hospital as soon as possible.
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