It's the chance he's been waiting for. 等待已久的机会终于到来

112. But the smaller male may be in luck.
     但较小的这只雄巨角犀运气不错
113. Another female,
     又来了一只雌巨角犀
114. and she seems to be alone.
     它似乎孤身一人
115. It's the chance he's been waiting for.
     等待已久的机会终于到来
116. He has a rival.
     居然还是有对手
117. This time, they're evenly matched.
     这次它们旗鼓相当
118. With these mammals...
     对于这些哺乳动物来说

来自《我们星球上的生命 第一季 第七集 Life on Our Planet S01E07 地球继承者》第 115 行