the firestorm of choking dust has enveloped half the planet. 窒息粉尘的火焰风暴已笼罩半个地球
and the world has all but been destroyed by a cataclysmic event. 世界几乎被一场灾难性事件摧毁
but like none the world has ever known. 但这与史上任何一个冬天都不同
has been raging for millions of years... 已经持续了数百万年
Living in a group has other advantages too, 一起生活还有其它优势