he has no natural enemies... 没有天敌

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
66. At over two and a half meters long and a half meter wide,
    长度超过2.5米 宽度超过半米
67. he has no natural enemies...
    没有天敌
68. ...so can focus all his energy on finding a mate.
    所以可以把全部精力放在觅偶上
69. But for Arthropleura,
    但是对节胸蜈蚣来说
70. the pursuit of the perfect partner is not straightforward.
    寻找一位完美的伴侣并不简单

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 67 行