There are 15 males in this bachelor group. 这个单身猴群里有十五只公猴

13. If they win, one of the challengers
    如果他们胜利了 其中一位挑战者
14. will take over the alpha's troop of females,
    将继承猴王的后宫
15. and may kill his infants.
    并杀死他的幼崽
16. There are 15 males in this bachelor group.
    这个单身猴群里有十五只公猴
17. The alpha must evict every single one of them from his territory.
    猴王必须把他们全部逐出自己的领地
18. He has chased half the bachelors away,
    他已经赶走了半数挑战者
19. but a splinter group has looped back
    但有一支小分队折了回来

来自《行星地球 第二季 第六集 Planet Earth S02E06 城市》第 16 行