and the rivers of fire are gradually subsiding. 熔岩河逐渐平息

5. But this is the story of the few...
   但是本集将讲述少数…
6. ...that survived.
   幸存者的故事
7. The start of the Triassic Period...
   三叠纪开始
8. and the rivers of fire are gradually subsiding.
   熔岩河逐渐平息
9. In their wake,
   因此
10. cooling lava covers an area
    冷却的熔岩覆盖了一片区域
11. half the size of the United States...
    有半个美国那么大

来自《我们星球上的生命 第一季 第四集 Life on Our Planet S01E04 冷血动物》第 8 行