1·But moreover can not filter of poisonous gas, but be not the ancients can make of.
而另外不能过滤的毒气，却不是古人所能制造的了。
2·Poisonous gas closed in on the town.
毒气渐渐笼罩了这个小镇。
3·Impossibly, he clearly took an anti-virus mask, basically can filter the poisonous gas of overwhelming majority.
不可能，他明明带着防毒面具了，基本上能够过滤掉绝大部分的毒气。
4·The old well was filled with poisonous gas.
那口古井里充满毒气。
5·But, unlike any other geyser, this one erupted with a poisonous gas.
但是，这个间歇泉不像其它间歇泉，它喷发的时候毒气也一起冲起来。