was only cut short by calamitous bad luck. 只因灾难性的厄运而被中断

73. They were to rule for over 150 million years.
    它们将统治超过1.5亿年
74. A group of astonishing variety,
    这是一个极其多样化的群体
75. whose absolute dominion
    其绝对的霸主地位
76. was only cut short by calamitous bad luck.
    只因灾难性的厄运而被中断
77. Out of their shadows
    在它们的阴影之下
78. rose the last great bloodline.
    最后的伟大血统崛起
79. The mammals.
    哺乳动物

来自《我们星球上的生命 第一季 第一集 Life on Our Planet S01E01 生命法则》第 76 行