But their dominance couldn't last, 但它们的统治无法持续

55. In the years following the mass extinction,
    在大灭绝之后的岁月中
56. they made up three-quarters of all vertebrate life on land,
    它们占据了陆地脊椎动物的四分之三
57. something no other animal has ever done.
    这是其他动物从未做到过的
58. But their dominance couldn't last,
    但它们的统治无法持续
59. for another survivor of the mass extinction
    因为大灭绝中的另一个幸存者
60. was on the ascent
    正在崛起
61. thanks to huge changes to the very structure of our planet.
    这得益于地球结构的巨大变化

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 58 行