大多数人都带着防毒面罩以防毒气。
Most of the people wear FILTER MASKS to protect them from the toxic air.
他们或通过防毒面罩，或携带沉重的氧气瓶进行呼吸。
They breathe through uncomfortable respirators or carry heavy oxygen tanks on their backs.
他们或通过防毒面罩，或携带沉重的氧气瓶进行呼吸。
They breathe through uncomfortable respirators or carry heavy oxygen tanks on their backs.
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