And with oxygen levels 60% higher than they are today, 当时的氧气水平比今天高60%

59. On land, that armor supported them
    在陆地上 这护甲支撑着它们
60. and prevented them from drying out.
    并防止水分流失
61. They could also breathe through this tough exterior.
    它们也可以通过这坚硬的外壳呼吸
62. And with oxygen levels 60% higher than they are today,
    当时的氧气水平比今天高60%
63. some grew to be giants.
    有一些节肢动物长得异常巨大
64. Arthropleura,
    节胸蜈蚣
65. the largest millipede to ever walk the Earth.
    地球历史上最大的千足虫

来自《我们星球上的生命 第一季 第三集 Life on Our Planet S01E03 入侵大地》第 62 行